Merge branch 'master' into gpr_review_tls

42 files changed, 642 insertions, 831 deletions

diff --git a/src/core/lib/compression/compression.cc b/src/core/lib/compression/compression.cc
index 99e6014b23..167e90fd26 100644
--- a/src/core/lib/compression/compression.cc
+++ b/src/core/lib/compression/compression.cc
@@ -29,8 +29,7 @@
 
 int grpc_compression_algorithm_is_message(
     grpc_compression_algorithm algorithm) {
-  return (algorithm >= GRPC_COMPRESS_MESSAGE_DEFLATE &&
-          algorithm <= GRPC_COMPRESS_MESSAGE_GZIP)
+  return (algorithm >= GRPC_COMPRESS_DEFLATE && algorithm <= GRPC_COMPRESS_GZIP)
              ? 1
              : 0;
 }
@@ -44,11 +43,11 @@ int grpc_compression_algorithm_parse(grpc_slice name,
   if (grpc_slice_eq(name, GRPC_MDSTR_IDENTITY)) {
     *algorithm = GRPC_COMPRESS_NONE;
     return 1;
-  } else if (grpc_slice_eq(name, GRPC_MDSTR_MESSAGE_SLASH_DEFLATE)) {
-    *algorithm = GRPC_COMPRESS_MESSAGE_DEFLATE;
+  } else if (grpc_slice_eq(name, GRPC_MDSTR_DEFLATE)) {
+    *algorithm = GRPC_COMPRESS_DEFLATE;
     return 1;
-  } else if (grpc_slice_eq(name, GRPC_MDSTR_MESSAGE_SLASH_GZIP)) {
-    *algorithm = GRPC_COMPRESS_MESSAGE_GZIP;
+  } else if (grpc_slice_eq(name, GRPC_MDSTR_GZIP)) {
+    *algorithm = GRPC_COMPRESS_GZIP;
     return 1;
   } else if (grpc_slice_eq(name, GRPC_MDSTR_STREAM_SLASH_GZIP)) {
     *algorithm = GRPC_COMPRESS_STREAM_GZIP;
@@ -67,11 +66,11 @@ int grpc_compression_algorithm_name(grpc_compression_algorithm algorithm,
     case GRPC_COMPRESS_NONE:
       *name = "identity";
       return 1;
-    case GRPC_COMPRESS_MESSAGE_DEFLATE:
-      *name = "message/deflate";
+    case GRPC_COMPRESS_DEFLATE:
+      *name = "deflate";
       return 1;
-    case GRPC_COMPRESS_MESSAGE_GZIP:
-      *name = "message/gzip";
+    case GRPC_COMPRESS_GZIP:
+      *name = "gzip";
       return 1;
     case GRPC_COMPRESS_STREAM_GZIP:
       *name = "stream/gzip";
@@ -133,10 +132,10 @@ grpc_slice grpc_compression_algorithm_slice(
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
       return GRPC_MDSTR_IDENTITY;
-    case GRPC_COMPRESS_MESSAGE_DEFLATE:
-      return GRPC_MDSTR_MESSAGE_SLASH_DEFLATE;
-    case GRPC_COMPRESS_MESSAGE_GZIP:
-      return GRPC_MDSTR_MESSAGE_SLASH_GZIP;
+    case GRPC_COMPRESS_DEFLATE:
+      return GRPC_MDSTR_DEFLATE;
+    case GRPC_COMPRESS_GZIP:
+      return GRPC_MDSTR_GZIP;
     case GRPC_COMPRESS_STREAM_GZIP:
       return GRPC_MDSTR_STREAM_SLASH_GZIP;
     case GRPC_COMPRESS_ALGORITHMS_COUNT:
@@ -148,10 +147,8 @@ grpc_slice grpc_compression_algorithm_slice(
 grpc_compression_algorithm grpc_compression_algorithm_from_slice(
     grpc_slice str) {
   if (grpc_slice_eq(str, GRPC_MDSTR_IDENTITY)) return GRPC_COMPRESS_NONE;
-  if (grpc_slice_eq(str, GRPC_MDSTR_MESSAGE_SLASH_DEFLATE))
-    return GRPC_COMPRESS_MESSAGE_DEFLATE;
-  if (grpc_slice_eq(str, GRPC_MDSTR_MESSAGE_SLASH_GZIP))
-    return GRPC_COMPRESS_MESSAGE_GZIP;
+  if (grpc_slice_eq(str, GRPC_MDSTR_DEFLATE)) return GRPC_COMPRESS_DEFLATE;
+  if (grpc_slice_eq(str, GRPC_MDSTR_GZIP)) return GRPC_COMPRESS_GZIP;
   if (grpc_slice_eq(str, GRPC_MDSTR_STREAM_SLASH_GZIP))
     return GRPC_COMPRESS_STREAM_GZIP;
   return GRPC_COMPRESS_ALGORITHMS_COUNT;
@@ -162,9 +159,9 @@ grpc_mdelem grpc_compression_encoding_mdelem(
   switch (algorithm) {
     case GRPC_COMPRESS_NONE:
       return GRPC_MDELEM_GRPC_ENCODING_IDENTITY;
-    case GRPC_COMPRESS_MESSAGE_DEFLATE:
+    case GRPC_COMPRESS_DEFLATE:
       return GRPC_MDELEM_GRPC_ENCODING_DEFLATE;
-    case GRPC_COMPRESS_MESSAGE_GZIP:
+    case GRPC_COMPRESS_GZIP:
       return GRPC_MDELEM_GRPC_ENCODING_GZIP;
     case GRPC_COMPRESS_STREAM_GZIP:
       return GRPC_MDELEM_GRPC_ENCODING_GZIP;
diff --git a/src/core/lib/compression/compression_internal.cc b/src/core/lib/compression/compression_internal.cc
index 263cdf06eb..1b7ead3301 100644
--- a/src/core/lib/compression/compression_internal.cc
+++ b/src/core/lib/compression/compression_internal.cc
@@ -80,9 +80,9 @@ grpc_message_compression_algorithm
 grpc_compression_algorithm_to_message_compression_algorithm(
     grpc_compression_algorithm algo) {
   switch (algo) {
-    case GRPC_COMPRESS_MESSAGE_DEFLATE:
+    case GRPC_COMPRESS_DEFLATE:
       return GRPC_MESSAGE_COMPRESS_DEFLATE;
-    case GRPC_COMPRESS_MESSAGE_GZIP:
+    case GRPC_COMPRESS_GZIP:
       return GRPC_MESSAGE_COMPRESS_GZIP;
     default:
       return GRPC_MESSAGE_COMPRESS_NONE;
@@ -147,10 +147,10 @@ int grpc_compression_algorithm_from_message_stream_compression_algorithm(
         *algorithm = GRPC_COMPRESS_NONE;
         return 1;
       case GRPC_MESSAGE_COMPRESS_DEFLATE:
-        *algorithm = GRPC_COMPRESS_MESSAGE_DEFLATE;
+        *algorithm = GRPC_COMPRESS_DEFLATE;
         return 1;
       case GRPC_MESSAGE_COMPRESS_GZIP:
-        *algorithm = GRPC_COMPRESS_MESSAGE_GZIP;
+        *algorithm = GRPC_COMPRESS_GZIP;
         return 1;
       default:
         *algorithm = GRPC_COMPRESS_NONE;
diff --git a/src/core/lib/compression/compression_ruby.cc b/src/core/lib/compression/compression_ruby.cc
deleted file mode 100644
index 293062f5ed..0000000000
--- a/src/core/lib/compression/compression_ruby.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- *
- * Copyright 2017 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#include <grpc/compression_ruby.h>
-#include <grpc/support/useful.h>
-
-#include "src/core/lib/surface/api_trace.h"
-#include "src/core/lib/transport/static_metadata.h"
-
-int grpc_compression_algorithm_parse_ruby(
-    grpc_slice name, grpc_compression_algorithm* algorithm) {
-  if (grpc_slice_eq(name, GRPC_MDSTR_IDENTITY)) {
-    *algorithm = GRPC_COMPRESS_NONE;
-    return 1;
-  } else if (grpc_slice_eq(name, GRPC_MDSTR_DEFLATE)) {
-    *algorithm = GRPC_COMPRESS_MESSAGE_DEFLATE;
-    return 1;
-  } else if (grpc_slice_eq(name, GRPC_MDSTR_GZIP)) {
-    *algorithm = GRPC_COMPRESS_MESSAGE_GZIP;
-    return 1;
-  } else if (grpc_slice_eq(name, GRPC_MDSTR_STREAM_SLASH_GZIP)) {
-    *algorithm = GRPC_COMPRESS_STREAM_GZIP;
-    return 1;
-  } else {
-    return 0;
-  }
-  return 0;
-}
-
-int grpc_compression_algorithm_name_ruby(grpc_compression_algorithm algorithm,
-                                         const char** name) {
-  GRPC_API_TRACE("grpc_compression_algorithm_parse(algorithm=%d, name=%p)", 2,
-                 ((int)algorithm, name));
-  switch (algorithm) {
-    case GRPC_COMPRESS_NONE:
-      *name = "identity";
-      return 1;
-    case GRPC_COMPRESS_MESSAGE_DEFLATE:
-      *name = "deflate";
-      return 1;
-    case GRPC_COMPRESS_MESSAGE_GZIP:
-      *name = "gzip";
-      return 1;
-    case GRPC_COMPRESS_STREAM_GZIP:
-      *name = "stream/gzip";
-      return 1;
-    case GRPC_COMPRESS_ALGORITHMS_COUNT:
-      return 0;
-  }
-  return 0;
-}
diff --git a/src/core/lib/gpr/alloc.cc b/src/core/lib/gpr/alloc.cc
index 000b7dcb25..b1d1550630 100644
--- a/src/core/lib/gpr/alloc.cc
+++ b/src/core/lib/gpr/alloc.cc
@@ -50,43 +50,39 @@ void gpr_set_allocation_functions(gpr_allocation_functions functions) {
 }
 
 void* gpr_malloc(size_t size) {
+  GPR_TIMER_SCOPE("gpr_malloc", 0);
   void* p;
   if (size == 0) return nullptr;
-  GPR_TIMER_BEGIN("gpr_malloc", 0);
   p = g_alloc_functions.malloc_fn(size);
   if (!p) {
     abort();
   }
-  GPR_TIMER_END("gpr_malloc", 0);
   return p;
 }
 
 void* gpr_zalloc(size_t size) {
+  GPR_TIMER_SCOPE("gpr_zalloc", 0);
   void* p;
   if (size == 0) return nullptr;
-  GPR_TIMER_BEGIN("gpr_zalloc", 0);
   p = g_alloc_functions.zalloc_fn(size);
   if (!p) {
     abort();
   }
-  GPR_TIMER_END("gpr_zalloc", 0);
   return p;
 }
 
 void gpr_free(void* p) {
-  GPR_TIMER_BEGIN("gpr_free", 0);
+  GPR_TIMER_SCOPE("gpr_free", 0);
   g_alloc_functions.free_fn(p);
-  GPR_TIMER_END("gpr_free", 0);
 }
 
 void* gpr_realloc(void* p, size_t size) {
+  GPR_TIMER_SCOPE("gpr_realloc", 0);
   if ((size == 0) && (p == nullptr)) return nullptr;
-  GPR_TIMER_BEGIN("gpr_realloc", 0);
   p = g_alloc_functions.realloc_fn(p, size);
   if (!p) {
     abort();
   }
-  GPR_TIMER_END("gpr_realloc", 0);
   return p;
 }
 
diff --git a/src/core/lib/gpr/env.h b/src/core/lib/gpr/env.h
index 7f35104be3..b31e20b7d2 100644
--- a/src/core/lib/gpr/env.h
+++ b/src/core/lib/gpr/env.h
@@ -29,7 +29,7 @@
    variable exists). */
 char* gpr_getenv(const char* name);
 
-/* Sets the the environment with the specified name to the specified value. */
+/* Sets the environment with the specified name to the specified value. */
 void gpr_setenv(const char* name, const char* value);
 
 /* This is a version of gpr_getenv that does not produce any output if it has to
diff --git a/src/core/lib/gpr/host_port.cc b/src/core/lib/gpr/host_port.cc
index 29178279d3..0776727906 100644
--- a/src/core/lib/gpr/host_port.cc
+++ b/src/core/lib/gpr/host_port.cc
@@ -16,13 +16,14 @@
  *
  */
 
-#include <grpc/support/host_port.h>
+#include "src/core/lib/gpr/host_port.h"
 
 #include <string.h>
 
 #include <grpc/support/alloc.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
+
 #include "src/core/lib/gpr/string.h"
 
 int gpr_join_host_port(char** out, const char* host, int port) {
diff --git a/src/core/lib/gpr/host_port.h b/src/core/lib/gpr/host_port.h
new file mode 100644
index 0000000000..0bf0960f82
--- /dev/null
+++ b/src/core/lib/gpr/host_port.h
@@ -0,0 +1,43 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_GPR_HOST_PORT_H
+#define GRPC_CORE_LIB_GPR_HOST_PORT_H
+
+#include <grpc/support/port_platform.h>
+
+/** Given a host and port, creates a newly-allocated string of the form
+   "host:port" or "[ho:st]:port", depending on whether the host contains colons
+   like an IPv6 literal.  If the host is already bracketed, then additional
+   brackets will not be added.
+
+   Usage is similar to gpr_asprintf: returns the number of bytes written
+   (excluding the final '\0'), and *out points to a string which must later be
+   destroyed using gpr_free().
+
+   In the unlikely event of an error, returns -1 and sets *out to NULL. */
+int gpr_join_host_port(char** out, const char* host, int port);
+
+/** Given a name in the form "host:port" or "[ho:st]:port", split into hostname
+   and port number, into newly allocated strings, which must later be
+   destroyed using gpr_free().
+   Return 1 on success, 0 on failure. Guarantees *host and *port == NULL on
+   failure. */
+int gpr_split_host_port(const char* name, char** host, char** port);
+
+#endif /* GRPC_CORE_LIB_GPR_HOST_PORT_H */
diff --git a/src/core/lib/gpr/sync_posix.cc b/src/core/lib/gpr/sync_posix.cc
index c3f6b10463..f23a8b2486 100644
--- a/src/core/lib/gpr/sync_posix.cc
+++ b/src/core/lib/gpr/sync_posix.cc
@@ -43,23 +43,19 @@ void gpr_mu_lock(gpr_mu* mu) {
 #ifdef GPR_LOW_LEVEL_COUNTERS
   GPR_ATM_INC_COUNTER(gpr_mu_locks);
 #endif
-  GPR_TIMER_BEGIN("gpr_mu_lock", 0);
+  GPR_TIMER_SCOPE("gpr_mu_lock", 0);
   GPR_ASSERT(pthread_mutex_lock(mu) == 0);
-  GPR_TIMER_END("gpr_mu_lock", 0);
 }
 
 void gpr_mu_unlock(gpr_mu* mu) {
-  GPR_TIMER_BEGIN("gpr_mu_unlock", 0);
+  GPR_TIMER_SCOPE("gpr_mu_unlock", 0);
   GPR_ASSERT(pthread_mutex_unlock(mu) == 0);
-  GPR_TIMER_END("gpr_mu_unlock", 0);
 }
 
 int gpr_mu_trylock(gpr_mu* mu) {
-  int err;
-  GPR_TIMER_BEGIN("gpr_mu_trylock", 0);
-  err = pthread_mutex_trylock(mu);
+  GPR_TIMER_SCOPE("gpr_mu_trylock", 0);
+  int err = pthread_mutex_trylock(mu);
   GPR_ASSERT(err == 0 || err == EBUSY);
-  GPR_TIMER_END("gpr_mu_trylock", 0);
   return err == 0;
 }
 
diff --git a/src/core/lib/gprpp/orphanable.h b/src/core/lib/gprpp/orphanable.h
index 50199730c9..78d1b01ff8 100644
--- a/src/core/lib/gprpp/orphanable.h
+++ b/src/core/lib/gprpp/orphanable.h
@@ -28,6 +28,7 @@
 #include "src/core/lib/gprpp/abstract.h"
 #include "src/core/lib/gprpp/debug_location.h"
 #include "src/core/lib/gprpp/memory.h"
+#include "src/core/lib/gprpp/ref_counted_ptr.h"
 
 namespace grpc_core {
 
@@ -69,6 +70,7 @@ inline OrphanablePtr<T> MakeOrphanable(Args&&... args) {
 }
 
 // A type of Orphanable with internal ref-counting.
+template <typename Child>
 class InternallyRefCounted : public Orphanable {
  public:
   // Not copyable nor movable.
@@ -78,10 +80,20 @@ class InternallyRefCounted : public Orphanable {
   GRPC_ABSTRACT_BASE_CLASS
 
  protected:
+  // Allow Delete() to access destructor.
+  template <typename T>
+  friend void Delete(T*);
+
+  // Allow RefCountedPtr<> to access Unref() and IncrementRefCount().
+  friend class RefCountedPtr<Child>;
+
   InternallyRefCounted() { gpr_ref_init(&refs_, 1); }
   virtual ~InternallyRefCounted() {}
 
-  void Ref() { gpr_ref(&refs_); }
+  RefCountedPtr<Child> Ref() GRPC_MUST_USE_RESULT {
+    IncrementRefCount();
+    return RefCountedPtr<Child>(static_cast<Child*>(this));
+  }
 
   void Unref() {
     if (gpr_unref(&refs_)) {
@@ -89,11 +101,9 @@ class InternallyRefCounted : public Orphanable {
     }
   }
 
-  // Allow Delete() to access destructor.
-  template <typename T>
-  friend void Delete(T*);
-
  private:
+  void IncrementRefCount() { gpr_ref(&refs_); }
+
   gpr_refcount refs_;
 };
 
@@ -103,6 +113,7 @@ class InternallyRefCounted : public Orphanable {
 // pointers and legacy code that is manually calling Ref() and Unref().
 // Once all of our code is converted to idiomatic C++, we may be able to
 // eliminate this class.
+template <typename Child>
 class InternallyRefCountedWithTracing : public Orphanable {
  public:
   // Not copyable nor movable.
@@ -118,6 +129,9 @@ class InternallyRefCountedWithTracing : public Orphanable {
   template <typename T>
   friend void Delete(T*);
 
+  // Allow RefCountedPtr<> to access Unref() and IncrementRefCount().
+  friend class RefCountedPtr<Child>;
+
   InternallyRefCountedWithTracing()
       : InternallyRefCountedWithTracing(static_cast<TraceFlag*>(nullptr)) {}
 
@@ -133,18 +147,27 @@ class InternallyRefCountedWithTracing : public Orphanable {
 
   virtual ~InternallyRefCountedWithTracing() {}
 
-  void Ref() { gpr_ref(&refs_); }
+  RefCountedPtr<Child> Ref() GRPC_MUST_USE_RESULT {
+    IncrementRefCount();
+    return RefCountedPtr<Child>(static_cast<Child*>(this));
+  }
 
-  void Ref(const DebugLocation& location, const char* reason) {
+  RefCountedPtr<Child> Ref(const DebugLocation& location,
+                           const char* reason) GRPC_MUST_USE_RESULT {
     if (location.Log() && trace_flag_ != nullptr && trace_flag_->enabled()) {
       gpr_atm old_refs = gpr_atm_no_barrier_load(&refs_.count);
       gpr_log(GPR_DEBUG, "%s:%p %s:%d ref %" PRIdPTR " -> %" PRIdPTR " %s",
               trace_flag_->name(), this, location.file(), location.line(),
               old_refs, old_refs + 1, reason);
     }
-    Ref();
+    return Ref();
   }
 
+  // TODO(roth): Once all of our code is converted to C++ and can use
+  // RefCountedPtr<> instead of manual ref-counting, make the Unref() methods
+  // private, since they will only be used by RefCountedPtr<>, which is a
+  // friend of this class.
+
   void Unref() {
     if (gpr_unref(&refs_)) {
       Delete(this);
@@ -162,6 +185,8 @@ class InternallyRefCountedWithTracing : public Orphanable {
   }
 
  private:
+  void IncrementRefCount() { gpr_ref(&refs_); }
+
   TraceFlag* trace_flag_ = nullptr;
   gpr_refcount refs_;
 };
diff --git a/src/core/lib/gprpp/ref_counted.h b/src/core/lib/gprpp/ref_counted.h
index c68118a71a..ab589fc01a 100644
--- a/src/core/lib/gprpp/ref_counted.h
+++ b/src/core/lib/gprpp/ref_counted.h
@@ -26,16 +26,28 @@
 #include "src/core/lib/gprpp/abstract.h"
 #include "src/core/lib/gprpp/debug_location.h"
 #include "src/core/lib/gprpp/memory.h"
+#include "src/core/lib/gprpp/ref_counted_ptr.h"
 
 namespace grpc_core {
 
 // A base class for reference-counted objects.
 // New objects should be created via New() and start with a refcount of 1.
 // When the refcount reaches 0, the object will be deleted via Delete().
+//
+// This will commonly be used by CRTP (curiously-recurring template pattern)
+// e.g., class MyClass : public RefCounted<MyClass>
+template <typename Child>
 class RefCounted {
  public:
-  void Ref() { gpr_ref(&refs_); }
+  RefCountedPtr<Child> Ref() GRPC_MUST_USE_RESULT {
+    IncrementRefCount();
+    return RefCountedPtr<Child>(static_cast<Child*>(this));
+  }
 
+  // TODO(roth): Once all of our code is converted to C++ and can use
+  // RefCountedPtr<> instead of manual ref-counting, make this method
+  // private, since it will only be used by RefCountedPtr<>, which is a
+  // friend of this class.
   void Unref() {
     if (gpr_unref(&refs_)) {
       Delete(this);
@@ -58,6 +70,11 @@ class RefCounted {
   virtual ~RefCounted() {}
 
  private:
+  // Allow RefCountedPtr<> to access IncrementRefCount().
+  friend class RefCountedPtr<Child>;
+
+  void IncrementRefCount() { gpr_ref(&refs_); }
+
   gpr_refcount refs_;
 };
 
@@ -67,20 +84,30 @@ class RefCounted {
 // pointers and legacy code that is manually calling Ref() and Unref().
 // Once all of our code is converted to idiomatic C++, we may be able to
 // eliminate this class.
+template <typename Child>
 class RefCountedWithTracing {
  public:
-  void Ref() { gpr_ref(&refs_); }
+  RefCountedPtr<Child> Ref() GRPC_MUST_USE_RESULT {
+    IncrementRefCount();
+    return RefCountedPtr<Child>(static_cast<Child*>(this));
+  }
 
-  void Ref(const DebugLocation& location, const char* reason) {
+  RefCountedPtr<Child> Ref(const DebugLocation& location,
+                           const char* reason) GRPC_MUST_USE_RESULT {
     if (location.Log() && trace_flag_ != nullptr && trace_flag_->enabled()) {
       gpr_atm old_refs = gpr_atm_no_barrier_load(&refs_.count);
       gpr_log(GPR_DEBUG, "%s:%p %s:%d ref %" PRIdPTR " -> %" PRIdPTR " %s",
               trace_flag_->name(), this, location.file(), location.line(),
               old_refs, old_refs + 1, reason);
     }
-    Ref();
+    return Ref();
   }
 
+  // TODO(roth): Once all of our code is converted to C++ and can use
+  // RefCountedPtr<> instead of manual ref-counting, make the Unref() methods
+  // private, since they will only be used by RefCountedPtr<>, which is a
+  // friend of this class.
+
   void Unref() {
     if (gpr_unref(&refs_)) {
       Delete(this);
@@ -124,6 +151,11 @@ class RefCountedWithTracing {
   virtual ~RefCountedWithTracing() {}
 
  private:
+  // Allow RefCountedPtr<> to access IncrementRefCount().
+  friend class RefCountedPtr<Child>;
+
+  void IncrementRefCount() { gpr_ref(&refs_); }
+
   TraceFlag* trace_flag_ = nullptr;
   gpr_refcount refs_;
 };
diff --git a/src/core/lib/gprpp/ref_counted_ptr.h b/src/core/lib/gprpp/ref_counted_ptr.h
index dda0f00d79..f82ba50da3 100644
--- a/src/core/lib/gprpp/ref_counted_ptr.h
+++ b/src/core/lib/gprpp/ref_counted_ptr.h
@@ -25,8 +25,8 @@
 
 namespace grpc_core {
 
-// A smart pointer class for objects that provide Ref() and Unref() methods,
-// such as those provided by the RefCounted base class.
+// A smart pointer class for objects that provide IncrementRefCount() and
+// Unref() methods, such as those provided by the RefCounted base class.
 template <typename T>
 class RefCountedPtr {
  public:
@@ -49,13 +49,13 @@ class RefCountedPtr {
 
   // Copy support.
   RefCountedPtr(const RefCountedPtr& other) {
-    if (other.value_ != nullptr) other.value_->Ref();
+    if (other.value_ != nullptr) other.value_->IncrementRefCount();
     value_ = other.value_;
   }
   RefCountedPtr& operator=(const RefCountedPtr& other) {
     // Note: Order of reffing and unreffing is important here in case value_
     // and other.value_ are the same object.
-    if (other.value_ != nullptr) other.value_->Ref();
+    if (other.value_ != nullptr) other.value_->IncrementRefCount();
     if (value_ != nullptr) value_->Unref();
     value_ = other.value_;
     return *this;
@@ -71,6 +71,16 @@ class RefCountedPtr {
     value_ = value;
   }
 
+  // TODO(roth): This method exists solely as a transition mechanism to allow
+  // us to pass a ref to idiomatic C code that does not use RefCountedPtr<>.
+  // Once all of our code has been converted to idiomatic C++, this
+  // method should go away.
+  T* release() {
+    T* value = value_;
+    value_ = nullptr;
+    return value;
+  }
+
   T* get() const { return value_; }
 
   T& operator*() const { return *value_; }
diff --git a/src/core/lib/iomgr/call_combiner.cc b/src/core/lib/iomgr/call_combiner.cc
index a9f48fb3c2..0e4c9cb3b3 100644
--- a/src/core/lib/iomgr/call_combiner.cc
+++ b/src/core/lib/iomgr/call_combiner.cc
@@ -60,7 +60,7 @@ void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
                               grpc_closure* closure,
                               grpc_error* error DEBUG_ARGS,
                               const char* reason) {
-  GPR_TIMER_BEGIN("call_combiner_start", 0);
+  GPR_TIMER_SCOPE("call_combiner_start", 0);
   if (grpc_call_combiner_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "==> grpc_call_combiner_start() [%p] closure=%p [" DEBUG_FMT_STR
@@ -92,12 +92,11 @@ void grpc_call_combiner_start(grpc_call_combiner* call_combiner,
     closure->error_data.error = error;
     gpr_mpscq_push(&call_combiner->queue, (gpr_mpscq_node*)closure);
   }
-  GPR_TIMER_END("call_combiner_start", 0);
 }
 
 void grpc_call_combiner_stop(grpc_call_combiner* call_combiner DEBUG_ARGS,
                              const char* reason) {
-  GPR_TIMER_BEGIN("call_combiner_stop", 0);
+  GPR_TIMER_SCOPE("call_combiner_stop", 0);
   if (grpc_call_combiner_trace.enabled()) {
     gpr_log(GPR_DEBUG,
             "==> grpc_call_combiner_stop() [%p] [" DEBUG_FMT_STR "%s]",
@@ -136,7 +135,6 @@ void grpc_call_combiner_stop(grpc_call_combiner* call_combiner DEBUG_ARGS,
   } else if (grpc_call_combiner_trace.enabled()) {
     gpr_log(GPR_DEBUG, "  queue empty");
   }
-  GPR_TIMER_END("call_combiner_stop", 0);
 }
 
 void grpc_call_combiner_set_notify_on_cancel(grpc_call_combiner* call_combiner,
diff --git a/src/core/lib/iomgr/closure.h b/src/core/lib/iomgr/closure.h
index 249fca6cd6..2bf2578c63 100644
--- a/src/core/lib/iomgr/closure.h
+++ b/src/core/lib/iomgr/closure.h
@@ -247,7 +247,7 @@ inline void grpc_closure_run(const char* file, int line, grpc_closure* c,
 #else
 inline void grpc_closure_run(grpc_closure* c, grpc_error* error) {
 #endif
-  GPR_TIMER_BEGIN("grpc_closure_run", 0);
+  GPR_TIMER_SCOPE("grpc_closure_run", 0);
   if (c != nullptr) {
 #ifndef NDEBUG
     c->file_initiated = file;
@@ -259,7 +259,6 @@ inline void grpc_closure_run(grpc_closure* c, grpc_error* error) {
   } else {
     GRPC_ERROR_UNREF(error);
   }
-  GPR_TIMER_END("grpc_closure_run", 0);
 }
 
 /** Run a closure directly. Caller ensures that no locks are being held above.
@@ -278,7 +277,7 @@ inline void grpc_closure_sched(const char* file, int line, grpc_closure* c,
 #else
 inline void grpc_closure_sched(grpc_closure* c, grpc_error* error) {
 #endif
-  GPR_TIMER_BEGIN("grpc_closure_sched", 0);
+  GPR_TIMER_SCOPE("grpc_closure_sched", 0);
   if (c != nullptr) {
 #ifndef NDEBUG
     if (c->scheduled) {
@@ -299,7 +298,6 @@ inline void grpc_closure_sched(grpc_closure* c, grpc_error* error) {
   } else {
     GRPC_ERROR_UNREF(error);
   }
-  GPR_TIMER_END("grpc_closure_sched", 0);
 }
 
 /** Schedule a closure to be run. Does not need to be run from a safe point. */
diff --git a/src/core/lib/iomgr/combiner.cc b/src/core/lib/iomgr/combiner.cc
index e4d7a6abd8..2965d807c1 100644
--- a/src/core/lib/iomgr/combiner.cc
+++ b/src/core/lib/iomgr/combiner.cc
@@ -153,8 +153,8 @@ static void push_first_on_exec_ctx(grpc_combiner* lock) {
                     offsetof(grpc_combiner, scheduler_name)))
 
 static void combiner_exec(grpc_closure* cl, grpc_error* error) {
+  GPR_TIMER_SCOPE("combiner.execute", 0);
   GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_ITEMS();
-  GPR_TIMER_BEGIN("combiner.execute", 0);
   grpc_combiner* lock = COMBINER_FROM_CLOSURE_SCHEDULER(cl, scheduler);
   gpr_atm last = gpr_atm_full_fetch_add(&lock->state, STATE_ELEM_COUNT_LOW_BIT);
   GRPC_COMBINER_TRACE(gpr_log(GPR_DEBUG,
@@ -181,7 +181,6 @@ static void combiner_exec(grpc_closure* cl, grpc_error* error) {
   assert(cl->cb);
   cl->error_data.error = error;
   gpr_mpscq_push(&lock->queue, &cl->next_data.atm_next);
-  GPR_TIMER_END("combiner.execute", 0);
 }
 
 static void move_next() {
@@ -207,11 +206,10 @@ static void queue_offload(grpc_combiner* lock) {
 }
 
 bool grpc_combiner_continue_exec_ctx() {
-  GPR_TIMER_BEGIN("combiner.continue_exec_ctx", 0);
+  GPR_TIMER_SCOPE("combiner.continue_exec_ctx", 0);
   grpc_combiner* lock =
       grpc_core::ExecCtx::Get()->combiner_data()->active_combiner;
   if (lock == nullptr) {
-    GPR_TIMER_END("combiner.continue_exec_ctx", 0);
     return false;
   }
 
@@ -233,7 +231,6 @@ bool grpc_combiner_continue_exec_ctx() {
     // this execution context wants to move on: schedule remaining work to be
     // picked up on the executor
     queue_offload(lock);
-    GPR_TIMER_END("combiner.continue_exec_ctx", 0);
     return true;
   }
 
@@ -249,10 +246,9 @@ bool grpc_combiner_continue_exec_ctx() {
       // go off and do something else for a while (and come back later)
       GPR_TIMER_MARK("delay_busy", 0);
       queue_offload(lock);
-      GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       return true;
     }
-    GPR_TIMER_BEGIN("combiner.exec1", 0);
+    GPR_TIMER_SCOPE("combiner.exec1", 0);
     grpc_closure* cl = (grpc_closure*)n;
     grpc_error* cl_err = cl->error_data.error;
 #ifndef NDEBUG
@@ -260,14 +256,13 @@ bool grpc_combiner_continue_exec_ctx() {
 #endif
     cl->cb(cl->cb_arg, cl_err);
     GRPC_ERROR_UNREF(cl_err);
-    GPR_TIMER_END("combiner.exec1", 0);
   } else {
     grpc_closure* c = lock->final_list.head;
     GPR_ASSERT(c != nullptr);
     grpc_closure_list_init(&lock->final_list);
     int loops = 0;
     while (c != nullptr) {
-      GPR_TIMER_BEGIN("combiner.exec_1final", 0);
+      GPR_TIMER_SCOPE("combiner.exec_1final", 0);
       GRPC_COMBINER_TRACE(
           gpr_log(GPR_DEBUG, "C:%p execute_final[%d] c=%p", lock, loops, c));
       grpc_closure* next = c->next_data.next;
@@ -278,7 +273,6 @@ bool grpc_combiner_continue_exec_ctx() {
       c->cb(c->cb_arg, error);
       GRPC_ERROR_UNREF(error);
       c = next;
-      GPR_TIMER_END("combiner.exec_1final", 0);
     }
   }
 
@@ -308,41 +302,36 @@ bool grpc_combiner_continue_exec_ctx() {
       break;
     case OLD_STATE_WAS(false, 1):
       // had one count, one unorphaned --> unlocked unorphaned
-      GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       return true;
     case OLD_STATE_WAS(true, 1):
       // and one count, one orphaned --> unlocked and orphaned
       really_destroy(lock);
-      GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       return true;
     case OLD_STATE_WAS(false, 0):
     case OLD_STATE_WAS(true, 0):
       // these values are illegal - representing an already unlocked or
       // deleted lock
-      GPR_TIMER_END("combiner.continue_exec_ctx", 0);
       GPR_UNREACHABLE_CODE(return true);
   }
   push_first_on_exec_ctx(lock);
-  GPR_TIMER_END("combiner.continue_exec_ctx", 0);
   return true;
 }
 
 static void enqueue_finally(void* closure, grpc_error* error);
 
 static void combiner_finally_exec(grpc_closure* closure, grpc_error* error) {
+  GPR_TIMER_SCOPE("combiner.execute_finally", 0);
   GRPC_STATS_INC_COMBINER_LOCKS_SCHEDULED_FINAL_ITEMS();
   grpc_combiner* lock =
       COMBINER_FROM_CLOSURE_SCHEDULER(closure, finally_scheduler);
   GRPC_COMBINER_TRACE(gpr_log(
       GPR_DEBUG, "C:%p grpc_combiner_execute_finally c=%p; ac=%p", lock,
       closure, grpc_core::ExecCtx::Get()->combiner_data()->active_combiner));
-  GPR_TIMER_BEGIN("combiner.execute_finally", 0);
   if (grpc_core::ExecCtx::Get()->combiner_data()->active_combiner != lock) {
     GPR_TIMER_MARK("slowpath", 0);
     GRPC_CLOSURE_SCHED(GRPC_CLOSURE_CREATE(enqueue_finally, closure,
                                            grpc_combiner_scheduler(lock)),
                        error);
-    GPR_TIMER_END("combiner.execute_finally", 0);
     return;
   }
 
@@ -350,7 +339,6 @@ static void combiner_finally_exec(grpc_closure* closure, grpc_error* error) {
     gpr_atm_full_fetch_add(&lock->state, STATE_ELEM_COUNT_LOW_BIT);
   }
   grpc_closure_list_append(&lock->final_list, closure, error);
-  GPR_TIMER_END("combiner.execute_finally", 0);
 }
 
 static void enqueue_finally(void* closure, grpc_error* error) {
diff --git a/src/core/lib/iomgr/error.cc b/src/core/lib/iomgr/error.cc
index 67c3caf5ee..0e27ad427c 100644
--- a/src/core/lib/iomgr/error.cc
+++ b/src/core/lib/iomgr/error.cc
@@ -314,7 +314,7 @@ static void internal_add_error(grpc_error** err, grpc_error* new_err) {
 grpc_error* grpc_error_create(const char* file, int line, grpc_slice desc,
                               grpc_error** referencing,
                               size_t num_referencing) {
-  GPR_TIMER_BEGIN("grpc_error_create", 0);
+  GPR_TIMER_SCOPE("grpc_error_create", 0);
   uint8_t initial_arena_capacity = (uint8_t)(
       DEFAULT_ERROR_CAPACITY +
       (uint8_t)(num_referencing * SLOTS_PER_LINKED_ERROR) + SURPLUS_CAPACITY);
@@ -355,7 +355,6 @@ grpc_error* grpc_error_create(const char* file, int line, grpc_slice desc,
 
   gpr_atm_no_barrier_store(&err->atomics.error_string, 0);
   gpr_ref_init(&err->atomics.refs, 1);
-  GPR_TIMER_END("grpc_error_create", 0);
   return err;
 }
 
@@ -378,7 +377,7 @@ static void ref_errs(grpc_error* err) {
 }
 
 static grpc_error* copy_error_and_unref(grpc_error* in) {
-  GPR_TIMER_BEGIN("copy_error_and_unref", 0);
+  GPR_TIMER_SCOPE("copy_error_and_unref", 0);
   grpc_error* out;
   if (grpc_error_is_special(in)) {
     out = GRPC_ERROR_CREATE_FROM_STATIC_STRING("unknown");
@@ -422,16 +421,14 @@ static grpc_error* copy_error_and_unref(grpc_error* in) {
     ref_errs(out);
     GRPC_ERROR_UNREF(in);
   }
-  GPR_TIMER_END("copy_error_and_unref", 0);
   return out;
 }
 
 grpc_error* grpc_error_set_int(grpc_error* src, grpc_error_ints which,
                                intptr_t value) {
-  GPR_TIMER_BEGIN("grpc_error_set_int", 0);
+  GPR_TIMER_SCOPE("grpc_error_set_int", 0);
   grpc_error* new_err = copy_error_and_unref(src);
   internal_set_int(&new_err, which, value);
-  GPR_TIMER_END("grpc_error_set_int", 0);
   return new_err;
 }
 
@@ -447,36 +444,31 @@ static special_error_status_map error_status_map[] = {
 };
 
 bool grpc_error_get_int(grpc_error* err, grpc_error_ints which, intptr_t* p) {
-  GPR_TIMER_BEGIN("grpc_error_get_int", 0);
+  GPR_TIMER_SCOPE("grpc_error_get_int", 0);
   if (grpc_error_is_special(err)) {
     if (which == GRPC_ERROR_INT_GRPC_STATUS) {
       for (size_t i = 0; i < GPR_ARRAY_SIZE(error_status_map); i++) {
         if (error_status_map[i].error == err) {
           if (p != nullptr) *p = error_status_map[i].code;
-          GPR_TIMER_END("grpc_error_get_int", 0);
           return true;
         }
       }
     }
-    GPR_TIMER_END("grpc_error_get_int", 0);
     return false;
   }
   uint8_t slot = err->ints[which];
   if (slot != UINT8_MAX) {
     if (p != nullptr) *p = err->arena[slot];
-    GPR_TIMER_END("grpc_error_get_int", 0);
     return true;
   }
-  GPR_TIMER_END("grpc_error_get_int", 0);
   return false;
 }
 
 grpc_error* grpc_error_set_str(grpc_error* src, grpc_error_strs which,
                                grpc_slice str) {
-  GPR_TIMER_BEGIN("grpc_error_set_str", 0);
+  GPR_TIMER_SCOPE("grpc_error_set_str", 0);
   grpc_error* new_err = copy_error_and_unref(src);
   internal_set_str(&new_err, which, str);
-  GPR_TIMER_END("grpc_error_set_str", 0);
   return new_err;
 }
 
@@ -503,10 +495,9 @@ bool grpc_error_get_str(grpc_error* err, grpc_error_strs which,
 }
 
 grpc_error* grpc_error_add_child(grpc_error* src, grpc_error* child) {
-  GPR_TIMER_BEGIN("grpc_error_add_child", 0);
+  GPR_TIMER_SCOPE("grpc_error_add_child", 0);
   grpc_error* new_err = copy_error_and_unref(src);
   internal_add_error(&new_err, child);
-  GPR_TIMER_END("grpc_error_add_child", 0);
   return new_err;
 }
 
@@ -722,14 +713,13 @@ static char* finish_kvs(kv_pairs* kvs) {
 }
 
 const char* grpc_error_string(grpc_error* err) {
-  GPR_TIMER_BEGIN("grpc_error_string", 0);
+  GPR_TIMER_SCOPE("grpc_error_string", 0);
   if (err == GRPC_ERROR_NONE) return no_error_string;
   if (err == GRPC_ERROR_OOM) return oom_error_string;
   if (err == GRPC_ERROR_CANCELLED) return cancelled_error_string;
 
   void* p = (void*)gpr_atm_acq_load(&err->atomics.error_string);
   if (p != nullptr) {
-    GPR_TIMER_END("grpc_error_string", 0);
     return (const char*)p;
   }
 
@@ -752,7 +742,6 @@ const char* grpc_error_string(grpc_error* err) {
     out = (char*)gpr_atm_acq_load(&err->atomics.error_string);
   }
 
-  GPR_TIMER_END("grpc_error_string", 0);
   return out;
 }
 
diff --git a/src/core/lib/iomgr/ev_epoll1_linux.cc b/src/core/lib/iomgr/ev_epoll1_linux.cc
index aa4ff67bc9..b7b5662922 100644
--- a/src/core/lib/iomgr/ev_epoll1_linux.cc
+++ b/src/core/lib/iomgr/ev_epoll1_linux.cc
@@ -519,7 +519,7 @@ static void pollset_destroy(grpc_pollset* pollset) {
 }
 
 static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
-  GPR_TIMER_BEGIN("pollset_kick_all", 0);
+  GPR_TIMER_SCOPE("pollset_kick_all", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   if (pollset->root_worker != nullptr) {
     grpc_pollset_worker* worker = pollset->root_worker;
@@ -549,7 +549,6 @@ static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
   }
   // TODO: sreek.  Check if we need to set 'kicked_without_poller' to true here
   // in the else case
-  GPR_TIMER_END("pollset_kick_all", 0);
   return error;
 }
 
@@ -563,14 +562,13 @@ static void pollset_maybe_finish_shutdown(grpc_pollset* pollset) {
 }
 
 static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
-  GPR_TIMER_BEGIN("pollset_shutdown", 0);
+  GPR_TIMER_SCOPE("pollset_shutdown", 0);
   GPR_ASSERT(pollset->shutdown_closure == nullptr);
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutdown_closure = closure;
   pollset->shutting_down = true;
   GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(pollset));
   pollset_maybe_finish_shutdown(pollset);
-  GPR_TIMER_END("pollset_shutdown", 0);
 }
 
 static int poll_deadline_to_millis_timeout(grpc_millis millis) {
@@ -594,10 +592,10 @@ static int poll_deadline_to_millis_timeout(grpc_millis millis) {
    called by g_active_poller thread. So there is no need for synchronization
    when accessing fields in g_epoll_set */
 static grpc_error* process_epoll_events(grpc_pollset* pollset) {
+  GPR_TIMER_SCOPE("process_epoll_events", 0);
+
   static const char* err_desc = "process_events";
   grpc_error* error = GRPC_ERROR_NONE;
-
-  GPR_TIMER_BEGIN("process_epoll_events", 0);
   long num_events = gpr_atm_acq_load(&g_epoll_set.num_events);
   long cursor = gpr_atm_acq_load(&g_epoll_set.cursor);
   for (int idx = 0;
@@ -626,7 +624,6 @@ static grpc_error* process_epoll_events(grpc_pollset* pollset) {
     }
   }
   gpr_atm_rel_store(&g_epoll_set.cursor, cursor);
-  GPR_TIMER_END("process_epoll_events", 0);
   return error;
 }
 
@@ -638,7 +635,7 @@ static grpc_error* process_epoll_events(grpc_pollset* pollset) {
    (i.e the designated poller thread) will be calling this function. So there is
    no need for any synchronization when accesing fields in g_epoll_set */
 static grpc_error* do_epoll_wait(grpc_pollset* ps, grpc_millis deadline) {
-  GPR_TIMER_BEGIN("do_epoll_wait", 0);
+  GPR_TIMER_SCOPE("do_epoll_wait", 0);
 
   int r;
   int timeout = poll_deadline_to_millis_timeout(deadline);
@@ -665,14 +662,13 @@ static grpc_error* do_epoll_wait(grpc_pollset* ps, grpc_millis deadline) {
   gpr_atm_rel_store(&g_epoll_set.num_events, r);
   gpr_atm_rel_store(&g_epoll_set.cursor, 0);
 
-  GPR_TIMER_END("do_epoll_wait", 0);
   return GRPC_ERROR_NONE;
 }
 
 static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                          grpc_pollset_worker** worker_hdl,
                          grpc_millis deadline) {
-  GPR_TIMER_BEGIN("begin_worker", 0);
+  GPR_TIMER_SCOPE("begin_worker", 0);
   if (worker_hdl != nullptr) *worker_hdl = worker;
   worker->initialized_cv = false;
   SET_KICK_STATE(worker, UNKICKED);
@@ -786,17 +782,15 @@ static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
 
   if (pollset->kicked_without_poller) {
     pollset->kicked_without_poller = false;
-    GPR_TIMER_END("begin_worker", 0);
     return false;
   }
 
-  GPR_TIMER_END("begin_worker", 0);
   return worker->state == DESIGNATED_POLLER && !pollset->shutting_down;
 }
 
 static bool check_neighborhood_for_available_poller(
     pollset_neighborhood* neighborhood) {
-  GPR_TIMER_BEGIN("check_neighborhood_for_available_poller", 0);
+  GPR_TIMER_SCOPE("check_neighborhood_for_available_poller", 0);
   bool found_worker = false;
   do {
     grpc_pollset* inspect = neighborhood->active_root;
@@ -855,13 +849,12 @@ static bool check_neighborhood_for_available_poller(
     }
     gpr_mu_unlock(&inspect->mu);
   } while (!found_worker);
-  GPR_TIMER_END("check_neighborhood_for_available_poller", 0);
   return found_worker;
 }
 
 static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                        grpc_pollset_worker** worker_hdl) {
-  GPR_TIMER_BEGIN("end_worker", 0);
+  GPR_TIMER_SCOPE("end_worker", 0);
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PS:%p END_WORKER:%p", pollset, worker);
   }
@@ -931,7 +924,6 @@ static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
     pollset_maybe_finish_shutdown(pollset);
   }
   GPR_ASSERT(gpr_atm_no_barrier_load(&g_active_poller) != (gpr_atm)worker);
-  GPR_TIMER_END("end_worker", 0);
 }
 
 /* pollset->po.mu lock must be held by the caller before calling this.
@@ -941,13 +933,12 @@ static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
 static grpc_error* pollset_work(grpc_pollset* ps,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
+  GPR_TIMER_SCOPE("pollset_work", 0);
   grpc_pollset_worker worker;
   grpc_error* error = GRPC_ERROR_NONE;
   static const char* err_desc = "pollset_work";
-  GPR_TIMER_BEGIN("pollset_work", 0);
   if (ps->kicked_without_poller) {
     ps->kicked_without_poller = false;
-    GPR_TIMER_END("pollset_work", 0);
     return GRPC_ERROR_NONE;
   }
 
@@ -987,13 +978,12 @@ static grpc_error* pollset_work(grpc_pollset* ps,
   end_worker(ps, &worker, worker_hdl);
 
   gpr_tls_set(&g_current_thread_pollset, 0);
-  GPR_TIMER_END("pollset_work", 0);
   return error;
 }
 
 static grpc_error* pollset_kick(grpc_pollset* pollset,
                                 grpc_pollset_worker* specific_worker) {
-  GPR_TIMER_BEGIN("pollset_kick", 0);
+  GPR_TIMER_SCOPE("pollset_kick", 0);
   GRPC_STATS_INC_POLLSET_KICK();
   grpc_error* ret_err = GRPC_ERROR_NONE;
   if (grpc_polling_trace.enabled()) {
@@ -1150,7 +1140,6 @@ static grpc_error* pollset_kick(grpc_pollset* pollset,
     goto done;
   }
 done:
-  GPR_TIMER_END("pollset_kick", 0);
   return ret_err;
 }
 
diff --git a/src/core/lib/iomgr/ev_epollex_linux.cc b/src/core/lib/iomgr/ev_epollex_linux.cc
index f82691dcc9..cd5a410545 100644
--- a/src/core/lib/iomgr/ev_epollex_linux.cc
+++ b/src/core/lib/iomgr/ev_epollex_linux.cc
@@ -57,7 +57,7 @@
 //#define GRPC_EPOLLEX_CREATE_WORKERS_ON_HEAP 1
 
 #define MAX_EPOLL_EVENTS 100
-#define MAX_EPOLL_EVENTS_HANDLED_EACH_POLL_CALL 5
+#define MAX_EPOLL_EVENTS_HANDLED_EACH_POLL_CALL 1
 
 grpc_core::DebugOnlyTraceFlag grpc_trace_pollable_refcount(false,
                                                            "pollable_refcount");
@@ -199,6 +199,7 @@ struct grpc_pollset {
   pollable* active_pollable;
   bool kicked_without_poller;
   grpc_closure* shutdown_closure;
+  bool already_shutdown;
   grpc_pollset_worker* root_worker;
   int containing_pollset_set_count;
 };
@@ -560,8 +561,10 @@ static void pollset_maybe_finish_shutdown(grpc_pollset* pollset) {
   }
   if (pollset->shutdown_closure != nullptr && pollset->root_worker == nullptr &&
       pollset->containing_pollset_set_count == 0) {
+    GPR_TIMER_MARK("pollset_finish_shutdown", 0);
     GRPC_CLOSURE_SCHED(pollset->shutdown_closure, GRPC_ERROR_NONE);
     pollset->shutdown_closure = nullptr;
+    pollset->already_shutdown = true;
   }
 }
 
@@ -569,6 +572,7 @@ static void pollset_maybe_finish_shutdown(grpc_pollset* pollset) {
  * pollset->active_pollable->mu & specific_worker->pollable_obj->mu must not be
  * held */
 static grpc_error* kick_one_worker(grpc_pollset_worker* specific_worker) {
+  GPR_TIMER_SCOPE("kick_one_worker", 0);
   pollable* p = specific_worker->pollable_obj;
   grpc_core::mu_guard lock(&p->mu);
   GPR_ASSERT(specific_worker != nullptr);
@@ -612,6 +616,7 @@ static grpc_error* kick_one_worker(grpc_pollset_worker* specific_worker) {
 
 static grpc_error* pollset_kick(grpc_pollset* pollset,
                                 grpc_pollset_worker* specific_worker) {
+  GPR_TIMER_SCOPE("pollset_kick", 0);
   GRPC_STATS_INC_POLLSET_KICK();
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG,
@@ -661,6 +666,7 @@ static grpc_error* pollset_kick(grpc_pollset* pollset,
 }
 
 static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
+  GPR_TIMER_SCOPE("pollset_kick_all", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   const char* err_desc = "pollset_kick_all";
   grpc_pollset_worker* w = pollset->root_worker;
@@ -677,6 +683,11 @@ static grpc_error* pollset_kick_all(grpc_pollset* pollset) {
 static void pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
   gpr_mu_init(&pollset->mu);
   pollset->active_pollable = POLLABLE_REF(g_empty_pollable, "pollset");
+  pollset->kicked_without_poller = false;
+  pollset->shutdown_closure = nullptr;
+  pollset->already_shutdown = false;
+  pollset->root_worker = nullptr;
+  pollset->containing_pollset_set_count = 0;
   *mu = &pollset->mu;
 }
 
@@ -733,6 +744,7 @@ static grpc_error* fd_get_or_become_pollable(grpc_fd* fd, pollable** p) {
 
 /* pollset->po.mu lock must be held by the caller before calling this */
 static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
+  GPR_TIMER_SCOPE("pollset_shutdown", 0);
   GPR_ASSERT(pollset->shutdown_closure == nullptr);
   pollset->shutdown_closure = closure;
   GRPC_LOG_IF_ERROR("pollset_shutdown", pollset_kick_all(pollset));
@@ -741,6 +753,7 @@ static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
 
 static grpc_error* pollable_process_events(grpc_pollset* pollset,
                                            pollable* pollable_obj, bool drain) {
+  GPR_TIMER_SCOPE("pollable_process_events", 0);
   static const char* err_desc = "pollset_process_events";
   grpc_error* error = GRPC_ERROR_NONE;
   for (int i = 0; (drain || i < MAX_EPOLL_EVENTS_HANDLED_EACH_POLL_CALL) &&
@@ -787,6 +800,7 @@ static void pollset_destroy(grpc_pollset* pollset) {
 }
 
 static grpc_error* pollable_epoll(pollable* p, grpc_millis deadline) {
+  GPR_TIMER_SCOPE("pollable_epoll", 0);
   int timeout = poll_deadline_to_millis_timeout(deadline);
 
   if (grpc_polling_trace.enabled()) {
@@ -862,7 +876,9 @@ static worker_remove_result worker_remove(grpc_pollset_worker** root_worker,
 static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                          grpc_pollset_worker** worker_hdl,
                          grpc_millis deadline) {
-  bool do_poll = (pollset->shutdown_closure == nullptr);
+  GPR_TIMER_SCOPE("begin_worker", 0);
+  bool do_poll =
+      (pollset->shutdown_closure == nullptr && !pollset->already_shutdown);
   if (worker_hdl != nullptr) *worker_hdl = worker;
   worker->initialized_cv = false;
   worker->kicked = false;
@@ -913,6 +929,7 @@ static bool begin_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
 
 static void end_worker(grpc_pollset* pollset, grpc_pollset_worker* worker,
                        grpc_pollset_worker** worker_hdl) {
+  GPR_TIMER_SCOPE("end_worker", 0);
   gpr_mu_lock(&pollset->mu);
   gpr_mu_lock(&worker->pollable_obj->mu);
   switch (worker_remove(&worker->pollable_obj->root_worker, worker,
@@ -955,6 +972,7 @@ static long gettid(void) { return syscall(__NR_gettid); }
 static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
+  GPR_TIMER_SCOPE("pollset_work", 0);
 #ifdef GRPC_EPOLLEX_CREATE_WORKERS_ON_HEAP
   grpc_pollset_worker* worker =
       (grpc_pollset_worker*)gpr_malloc(sizeof(*worker));
@@ -1092,6 +1110,16 @@ static grpc_error* pollset_as_multipollable_locked(grpc_pollset* pollset,
     case PO_EMPTY:
       POLLABLE_UNREF(pollset->active_pollable, "pollset");
       error = pollable_create(PO_MULTI, &pollset->active_pollable);
+      /* Any workers currently polling on this pollset must now be woked up so
+       * that they can pick up the new active_pollable */
+      if (grpc_polling_trace.enabled()) {
+        gpr_log(GPR_DEBUG,
+                "PS:%p active pollable transition from empty to multi",
+                pollset);
+      }
+      static const char* err_desc =
+          "pollset_as_multipollable_locked: empty -> multi";
+      append_error(&error, pollset_kick_all(pollset), err_desc);
       break;
     case PO_FD:
       gpr_mu_lock(&po_at_start->owner_fd->orphan_mu);
@@ -1120,6 +1148,7 @@ static grpc_error* pollset_as_multipollable_locked(grpc_pollset* pollset,
 }
 
 static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
+  GPR_TIMER_SCOPE("pollset_add_fd", 0);
   gpr_mu_lock(&pollset->mu);
   grpc_error* error = pollset_add_fd_locked(pollset, fd);
   gpr_mu_unlock(&pollset->mu);
@@ -1168,6 +1197,7 @@ static void pollset_set_unref(grpc_pollset_set* pss) {
 }
 
 static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {
+  GPR_TIMER_SCOPE("pollset_set_add_fd", 0);
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: add fd %p (%d)", pss, fd, fd->fd);
   }
@@ -1191,6 +1221,7 @@ static void pollset_set_add_fd(grpc_pollset_set* pss, grpc_fd* fd) {
 }
 
 static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {
+  GPR_TIMER_SCOPE("pollset_set_del_fd", 0);
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: del fd %p", pss, fd);
   }
@@ -1211,6 +1242,7 @@ static void pollset_set_del_fd(grpc_pollset_set* pss, grpc_fd* fd) {
 }
 
 static void pollset_set_del_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
+  GPR_TIMER_SCOPE("pollset_set_del_pollset", 0);
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: del pollset %p", pss, ps);
   }
@@ -1241,6 +1273,7 @@ static grpc_error* add_fds_to_pollsets(grpc_fd** fds, size_t fd_count,
                                        size_t pollset_count,
                                        const char* err_desc, grpc_fd** out_fds,
                                        size_t* out_fd_count) {
+  GPR_TIMER_SCOPE("add_fds_to_pollsets", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   for (size_t i = 0; i < fd_count; i++) {
     gpr_mu_lock(&fds[i]->orphan_mu);
@@ -1261,6 +1294,7 @@ static grpc_error* add_fds_to_pollsets(grpc_fd** fds, size_t fd_count,
 }
 
 static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
+  GPR_TIMER_SCOPE("pollset_set_add_pollset", 0);
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS:%p: add pollset %p", pss, ps);
   }
@@ -1297,6 +1331,7 @@ static void pollset_set_add_pollset(grpc_pollset_set* pss, grpc_pollset* ps) {
 
 static void pollset_set_add_pollset_set(grpc_pollset_set* a,
                                         grpc_pollset_set* b) {
+  GPR_TIMER_SCOPE("pollset_set_add_pollset_set", 0);
   if (grpc_polling_trace.enabled()) {
     gpr_log(GPR_DEBUG, "PSS: merge (%p, %p)", a, b);
   }
@@ -1417,10 +1452,6 @@ static const grpc_event_engine_vtable vtable = {
 
 const grpc_event_engine_vtable* grpc_init_epollex_linux(
     bool explicitly_requested) {
-  if (!explicitly_requested) {
-    return nullptr;
-  }
-
   if (!grpc_has_wakeup_fd()) {
     gpr_log(GPR_ERROR, "Skipping epollex because of no wakeup fd.");
     return nullptr;
diff --git a/src/core/lib/iomgr/ev_epollsig_linux.cc b/src/core/lib/iomgr/ev_epollsig_linux.cc
index 80ad9ebed2..416447f3da 100644
--- a/src/core/lib/iomgr/ev_epollsig_linux.cc
+++ b/src/core/lib/iomgr/ev_epollsig_linux.cc
@@ -1024,7 +1024,7 @@ static void push_front_worker(grpc_pollset* p, grpc_pollset_worker* worker) {
 /* p->mu must be held before calling this function */
 static grpc_error* pollset_kick(grpc_pollset* p,
                                 grpc_pollset_worker* specific_worker) {
-  GPR_TIMER_BEGIN("pollset_kick", 0);
+  GPR_TIMER_SCOPE("pollset_kick", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   GRPC_STATS_INC_POLLSET_KICK();
   const char* err_desc = "Kick Failure";
@@ -1032,14 +1032,13 @@ static grpc_error* pollset_kick(grpc_pollset* p,
   if (worker != nullptr) {
     if (worker == GRPC_POLLSET_KICK_BROADCAST) {
       if (pollset_has_workers(p)) {
-        GPR_TIMER_BEGIN("pollset_kick.broadcast", 0);
+        GPR_TIMER_SCOPE("pollset_kick.broadcast", 0);
         for (worker = p->root_worker.next; worker != &p->root_worker;
              worker = worker->next) {
           if (gpr_tls_get(&g_current_thread_worker) != (intptr_t)worker) {
             append_error(&error, pollset_worker_kick(worker), err_desc);
           }
         }
-        GPR_TIMER_END("pollset_kick.broadcast", 0);
       } else {
         p->kicked_without_pollers = true;
       }
@@ -1069,7 +1068,6 @@ static grpc_error* pollset_kick(grpc_pollset* p,
     }
   }
 
-  GPR_TIMER_END("pollset_kick", 0);
   GRPC_LOG_IF_ERROR("pollset_kick", GRPC_ERROR_REF(error));
   return error;
 }
@@ -1136,7 +1134,7 @@ static void finish_shutdown_locked(grpc_pollset* pollset) {
 
 /* pollset->po.mu lock must be held by the caller before calling this */
 static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
-  GPR_TIMER_BEGIN("pollset_shutdown", 0);
+  GPR_TIMER_SCOPE("pollset_shutdown", 0);
   GPR_ASSERT(!pollset->shutting_down);
   pollset->shutting_down = true;
   pollset->shutdown_done = closure;
@@ -1150,7 +1148,6 @@ static void pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
     GPR_TIMER_MARK("pollset_shutdown.finish_shutdown_locked", 0);
     finish_shutdown_locked(pollset);
   }
-  GPR_TIMER_END("pollset_shutdown", 0);
 }
 
 /* pollset_shutdown is guaranteed to be called before pollset_destroy. So other
@@ -1166,13 +1163,13 @@ static void pollset_destroy(grpc_pollset* pollset) {
 static void pollset_work_and_unlock(grpc_pollset* pollset,
                                     grpc_pollset_worker* worker, int timeout_ms,
                                     sigset_t* sig_mask, grpc_error** error) {
+  GPR_TIMER_SCOPE("pollset_work_and_unlock", 0);
   struct epoll_event ep_ev[GRPC_EPOLL_MAX_EVENTS];
   int epoll_fd = -1;
   int ep_rv;
   polling_island* pi = nullptr;
   char* err_msg;
   const char* err_desc = "pollset_work_and_unlock";
-  GPR_TIMER_BEGIN("pollset_work_and_unlock", 0);
 
   /* We need to get the epoll_fd to wait on. The epoll_fd is in inside the
      latest polling island pointed by pollset->po.pi
@@ -1187,7 +1184,6 @@ static void pollset_work_and_unlock(grpc_pollset* pollset,
   if (pollset->po.pi == nullptr) {
     pollset->po.pi = polling_island_create(nullptr, error);
     if (pollset->po.pi == nullptr) {
-      GPR_TIMER_END("pollset_work_and_unlock", 0);
       return; /* Fatal error. We cannot continue */
     }
 
@@ -1279,8 +1275,6 @@ static void pollset_work_and_unlock(grpc_pollset* pollset,
      pollset->po.pi pointer might get udpated in other parts of the
      code when there is an island merge while we are doing epoll_wait() above */
   PI_UNREF(pi, "ps_work");
-
-  GPR_TIMER_END("pollset_work_and_unlock", 0);
 }
 
 /* pollset->po.mu lock must be held by the caller before calling this.
@@ -1290,7 +1284,7 @@ static void pollset_work_and_unlock(grpc_pollset* pollset,
 static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
-  GPR_TIMER_BEGIN("pollset_work", 0);
+  GPR_TIMER_SCOPE("pollset_work", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   int timeout_ms = poll_deadline_to_millis_timeout(deadline);
 
@@ -1384,15 +1378,13 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
   gpr_tls_set(&g_current_thread_pollset, (intptr_t)0);
   gpr_tls_set(&g_current_thread_worker, (intptr_t)0);
 
-  GPR_TIMER_END("pollset_work", 0);
-
   GRPC_LOG_IF_ERROR("pollset_work", GRPC_ERROR_REF(error));
   return error;
 }
 
 static void add_poll_object(poll_obj* bag, poll_obj_type bag_type,
                             poll_obj* item, poll_obj_type item_type) {
-  GPR_TIMER_BEGIN("add_poll_object", 0);
+  GPR_TIMER_SCOPE("add_poll_object", 0);
 
 #ifndef NDEBUG
   GPR_ASSERT(item->obj_type == item_type);
@@ -1535,7 +1527,6 @@ retry:
   gpr_mu_unlock(&bag->mu);
 
   GRPC_LOG_IF_ERROR("add_poll_object", error);
-  GPR_TIMER_END("add_poll_object", 0);
 }
 
 static void pollset_add_fd(grpc_pollset* pollset, grpc_fd* fd) {
diff --git a/src/core/lib/iomgr/ev_poll_posix.cc b/src/core/lib/iomgr/ev_poll_posix.cc
index cad417892f..5284fb4104 100644
--- a/src/core/lib/iomgr/ev_poll_posix.cc
+++ b/src/core/lib/iomgr/ev_poll_posix.cc
@@ -457,16 +457,20 @@ static grpc_error* fd_shutdown_error(grpc_fd* fd) {
   if (!fd->shutdown) {
     return GRPC_ERROR_NONE;
   } else {
-    return GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
-        "FD shutdown", &fd->shutdown_error, 1);
+    return grpc_error_set_int(GRPC_ERROR_CREATE_REFERENCING_FROM_STATIC_STRING(
+                                  "FD shutdown", &fd->shutdown_error, 1),
+                              GRPC_ERROR_INT_GRPC_STATUS,
+                              GRPC_STATUS_UNAVAILABLE);
   }
 }
 
 static void notify_on_locked(grpc_fd* fd, grpc_closure** st,
                              grpc_closure* closure) {
   if (fd->shutdown || gpr_atm_no_barrier_load(&fd->pollhup)) {
-    GRPC_CLOSURE_SCHED(closure,
-                       GRPC_ERROR_CREATE_FROM_STATIC_STRING("FD shutdown"));
+    GRPC_CLOSURE_SCHED(
+        closure, grpc_error_set_int(
+                     GRPC_ERROR_CREATE_FROM_STATIC_STRING("FD shutdown"),
+                     GRPC_ERROR_INT_GRPC_STATUS, GRPC_STATUS_UNAVAILABLE));
   } else if (*st == CLOSURE_NOT_READY) {
     /* not ready ==> switch to a waiting state by setting the closure */
     *st = closure;
@@ -706,14 +710,14 @@ static void kick_append_error(grpc_error** composite, grpc_error* error) {
 static grpc_error* pollset_kick_ext(grpc_pollset* p,
                                     grpc_pollset_worker* specific_worker,
                                     uint32_t flags) {
-  GPR_TIMER_BEGIN("pollset_kick_ext", 0);
+  GPR_TIMER_SCOPE("pollset_kick_ext", 0);
   grpc_error* error = GRPC_ERROR_NONE;
   GRPC_STATS_INC_POLLSET_KICK();
 
   /* pollset->mu already held */
   if (specific_worker != nullptr) {
     if (specific_worker == GRPC_POLLSET_KICK_BROADCAST) {
-      GPR_TIMER_BEGIN("pollset_kick_ext.broadcast", 0);
+      GPR_TIMER_SCOPE("pollset_kick_ext.broadcast", 0);
       GPR_ASSERT((flags & GRPC_POLLSET_REEVALUATE_POLLING_ON_WAKEUP) == 0);
       for (specific_worker = p->root_worker.next;
            specific_worker != &p->root_worker;
@@ -722,7 +726,6 @@ static grpc_error* pollset_kick_ext(grpc_pollset* p,
             &error, grpc_wakeup_fd_wakeup(&specific_worker->wakeup_fd->fd));
       }
       p->kicked_without_pollers = true;
-      GPR_TIMER_END("pollset_kick_ext.broadcast", 0);
     } else if (gpr_tls_get(&g_current_thread_worker) !=
                (intptr_t)specific_worker) {
       GPR_TIMER_MARK("different_thread_worker", 0);
@@ -769,7 +772,6 @@ static grpc_error* pollset_kick_ext(grpc_pollset* p,
     }
   }
 
-  GPR_TIMER_END("pollset_kick_ext", 0);
   GRPC_LOG_IF_ERROR("pollset_kick_ext", GRPC_ERROR_REF(error));
   return error;
 }
@@ -864,6 +866,8 @@ static void work_combine_error(grpc_error** composite, grpc_error* error) {
 static grpc_error* pollset_work(grpc_pollset* pollset,
                                 grpc_pollset_worker** worker_hdl,
                                 grpc_millis deadline) {
+  GPR_TIMER_SCOPE("pollset_work", 0);
+
   grpc_pollset_worker worker;
   if (worker_hdl) *worker_hdl = &worker;
   grpc_error* error = GRPC_ERROR_NONE;
@@ -878,7 +882,6 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
   int locked = 1;
   int queued_work = 0;
   int keep_polling = 0;
-  GPR_TIMER_BEGIN("pollset_work", 0);
   /* this must happen before we (potentially) drop pollset->mu */
   worker.next = worker.prev = nullptr;
   worker.reevaluate_polling_on_wakeup = 0;
@@ -921,7 +924,7 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
         added_worker = 1;
         gpr_tls_set(&g_current_thread_worker, (intptr_t)&worker);
       }
-      GPR_TIMER_BEGIN("maybe_work_and_unlock", 0);
+      GPR_TIMER_SCOPE("maybe_work_and_unlock", 0);
 #define POLLOUT_CHECK (POLLOUT | POLLHUP | POLLERR)
 #define POLLIN_CHECK (POLLIN | POLLHUP | POLLERR)
 
@@ -1037,7 +1040,6 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
         gpr_free(pfds);
       }
 
-      GPR_TIMER_END("maybe_work_and_unlock", 0);
       locked = 0;
     } else {
       GPR_TIMER_MARK("pollset_work.kicked_without_pollers", 0);
@@ -1097,7 +1099,6 @@ static grpc_error* pollset_work(grpc_pollset* pollset,
     }
   }
   if (worker_hdl) *worker_hdl = nullptr;
-  GPR_TIMER_END("pollset_work", 0);
   GRPC_LOG_IF_ERROR("pollset_work", GRPC_ERROR_REF(error));
   return error;
 }
diff --git a/src/core/lib/iomgr/ev_posix.cc b/src/core/lib/iomgr/ev_posix.cc
index 3a5714132d..8100bece8f 100644
--- a/src/core/lib/iomgr/ev_posix.cc
+++ b/src/core/lib/iomgr/ev_posix.cc
@@ -39,6 +39,18 @@
 grpc_core::TraceFlag grpc_polling_trace(false,
                                         "polling"); /* Disabled by default */
 grpc_core::DebugOnlyTraceFlag grpc_trace_fd_refcount(false, "fd_refcount");
+grpc_core::DebugOnlyTraceFlag grpc_polling_api_trace(false, "polling_api");
+
+#ifndef NDEBUG
+
+// Polling API trace only enabled in debug builds
+#define GRPC_POLLING_API_TRACE(format, ...)                   \
+  if (grpc_polling_api_trace.enabled()) {                     \
+    gpr_log(GPR_DEBUG, "(polling-api) " format, __VA_ARGS__); \
+  }
+#else
+#define GRPC_POLLING_API_TRACE(...)
+#endif
 
 /** Default poll() function - a pointer so that it can be overridden by some
  *  tests */
@@ -177,6 +189,7 @@ void grpc_event_engine_shutdown(void) {
 }
 
 grpc_fd* grpc_fd_create(int fd, const char* name) {
+  GRPC_POLLING_API_TRACE("fd_create(%d, %s)", fd, name);
   return g_event_engine->fd_create(fd, name);
 }
 
@@ -186,10 +199,14 @@ int grpc_fd_wrapped_fd(grpc_fd* fd) {
 
 void grpc_fd_orphan(grpc_fd* fd, grpc_closure* on_done, int* release_fd,
                     bool already_closed, const char* reason) {
+  GRPC_POLLING_API_TRACE("fd_orphan(%d, %p, %p, %d, %s)",
+                         grpc_fd_wrapped_fd(fd), on_done, release_fd,
+                         already_closed, reason);
   g_event_engine->fd_orphan(fd, on_done, release_fd, already_closed, reason);
 }
 
 void grpc_fd_shutdown(grpc_fd* fd, grpc_error* why) {
+  GRPC_POLLING_API_TRACE("fd_shutdown(%d)", grpc_fd_wrapped_fd(fd));
   g_event_engine->fd_shutdown(fd, why);
 }
 
@@ -208,65 +225,89 @@ void grpc_fd_notify_on_write(grpc_fd* fd, grpc_closure* closure) {
 size_t grpc_pollset_size(void) { return g_event_engine->pollset_size; }
 
 void grpc_pollset_init(grpc_pollset* pollset, gpr_mu** mu) {
+  GRPC_POLLING_API_TRACE("pollset_init(%p)", pollset);
   g_event_engine->pollset_init(pollset, mu);
 }
 
 void grpc_pollset_shutdown(grpc_pollset* pollset, grpc_closure* closure) {
+  GRPC_POLLING_API_TRACE("pollset_shutdown(%p)", pollset);
   g_event_engine->pollset_shutdown(pollset, closure);
 }
 
 void grpc_pollset_destroy(grpc_pollset* pollset) {
+  GRPC_POLLING_API_TRACE("pollset_destroy(%p)", pollset);
   g_event_engine->pollset_destroy(pollset);
 }
 
 grpc_error* grpc_pollset_work(grpc_pollset* pollset,
                               grpc_pollset_worker** worker,
                               grpc_millis deadline) {
-  return g_event_engine->pollset_work(pollset, worker, deadline);
+  GRPC_POLLING_API_TRACE("pollset_work(%p, %" PRIdPTR ") begin", pollset,
+                         deadline);
+  grpc_error* err = g_event_engine->pollset_work(pollset, worker, deadline);
+  GRPC_POLLING_API_TRACE("pollset_work(%p, %" PRIdPTR ") end", pollset,
+                         deadline);
+  return err;
 }
 
 grpc_error* grpc_pollset_kick(grpc_pollset* pollset,
                               grpc_pollset_worker* specific_worker) {
+  GRPC_POLLING_API_TRACE("pollset_kick(%p, %p)", pollset, specific_worker);
   return g_event_engine->pollset_kick(pollset, specific_worker);
 }
 
 void grpc_pollset_add_fd(grpc_pollset* pollset, struct grpc_fd* fd) {
+  GRPC_POLLING_API_TRACE("pollset_add_fd(%p, %d)", pollset,
+                         grpc_fd_wrapped_fd(fd));
   g_event_engine->pollset_add_fd(pollset, fd);
 }
 
 grpc_pollset_set* grpc_pollset_set_create(void) {
-  return g_event_engine->pollset_set_create();
+  grpc_pollset_set* pss = g_event_engine->pollset_set_create();
+  GRPC_POLLING_API_TRACE("pollset_set_create(%p)", pss);
+  return pss;
 }
 
 void grpc_pollset_set_destroy(grpc_pollset_set* pollset_set) {
+  GRPC_POLLING_API_TRACE("pollset_set_destroy(%p)", pollset_set);
   g_event_engine->pollset_set_destroy(pollset_set);
 }
 
 void grpc_pollset_set_add_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {
+  GRPC_POLLING_API_TRACE("pollset_set_add_pollset(%p, %p)", pollset_set,
+                         pollset);
   g_event_engine->pollset_set_add_pollset(pollset_set, pollset);
 }
 
 void grpc_pollset_set_del_pollset(grpc_pollset_set* pollset_set,
                                   grpc_pollset* pollset) {
+  GRPC_POLLING_API_TRACE("pollset_set_del_pollset(%p, %p)", pollset_set,
+                         pollset);
   g_event_engine->pollset_set_del_pollset(pollset_set, pollset);
 }
 
 void grpc_pollset_set_add_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {
+  GRPC_POLLING_API_TRACE("pollset_set_add_pollset_set(%p, %p)", bag, item);
   g_event_engine->pollset_set_add_pollset_set(bag, item);
 }
 
 void grpc_pollset_set_del_pollset_set(grpc_pollset_set* bag,
                                       grpc_pollset_set* item) {
+  GRPC_POLLING_API_TRACE("pollset_set_del_pollset_set(%p, %p)", bag, item);
   g_event_engine->pollset_set_del_pollset_set(bag, item);
 }
 
 void grpc_pollset_set_add_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
+  GRPC_POLLING_API_TRACE("pollset_set_add_fd(%p, %d)", pollset_set,
+                         grpc_fd_wrapped_fd(fd));
   g_event_engine->pollset_set_add_fd(pollset_set, fd);
 }
 
 void grpc_pollset_set_del_fd(grpc_pollset_set* pollset_set, grpc_fd* fd) {
+  GRPC_POLLING_API_TRACE("pollset_set_del_fd(%p, %d)", pollset_set,
+                         grpc_fd_wrapped_fd(fd));
   g_event_engine->pollset_set_del_fd(pollset_set, fd);
 }
 
diff --git a/src/core/lib/iomgr/exec_ctx.cc b/src/core/lib/iomgr/exec_ctx.cc
index e005437e0a..03c833ff07 100644
--- a/src/core/lib/iomgr/exec_ctx.cc
+++ b/src/core/lib/iomgr/exec_ctx.cc
@@ -113,7 +113,7 @@ void ExecCtx::GlobalInit(void) {
 
 bool ExecCtx::Flush() {
   bool did_something = 0;
-  GPR_TIMER_BEGIN("grpc_exec_ctx_flush", 0);
+  GPR_TIMER_SCOPE("grpc_exec_ctx_flush", 0);
   for (;;) {
     if (!grpc_closure_list_empty(closure_list_)) {
       grpc_closure* c = closure_list_.head;
@@ -130,7 +130,6 @@ bool ExecCtx::Flush() {
     }
   }
   GPR_ASSERT(combiner_data_.active_combiner == nullptr);
-  GPR_TIMER_END("grpc_exec_ctx_flush", 0);
   return did_something;
 }
 
diff --git a/src/core/lib/iomgr/resolve_address_posix.cc b/src/core/lib/iomgr/resolve_address_posix.cc
index 176caee490..7ed2862903 100644
--- a/src/core/lib/iomgr/resolve_address_posix.cc
+++ b/src/core/lib/iomgr/resolve_address_posix.cc
@@ -27,12 +27,13 @@
 #include <sys/types.h>
 
 #include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
 #include <grpc/support/useful.h>
+
+#include "src/core/lib/gpr/host_port.h"
 #include "src/core/lib/gpr/string.h"
 #include "src/core/lib/iomgr/block_annotate.h"
 #include "src/core/lib/iomgr/executor.h"
diff --git a/src/core/lib/iomgr/resolve_address_uv.cc b/src/core/lib/iomgr/resolve_address_uv.cc
index 3eab04f3de..7252555bd0 100644
--- a/src/core/lib/iomgr/resolve_address_uv.cc
+++ b/src/core/lib/iomgr/resolve_address_uv.cc
@@ -22,11 +22,11 @@
 #include <uv.h>
 
 #include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/useful.h>
 
+#include "src/core/lib/gpr/host_port.h"
 #include "src/core/lib/iomgr/closure.h"
 #include "src/core/lib/iomgr/error.h"
 #include "src/core/lib/iomgr/exec_ctx.h"
diff --git a/src/core/lib/iomgr/resolve_address_windows.cc b/src/core/lib/iomgr/resolve_address_windows.cc
index e44ab396b3..e875d77fd8 100644
--- a/src/core/lib/iomgr/resolve_address_windows.cc
+++ b/src/core/lib/iomgr/resolve_address_windows.cc
@@ -28,12 +28,13 @@
 #include <sys/types.h>
 
 #include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/log_windows.h>
 #include <grpc/support/string_util.h>
 #include <grpc/support/thd.h>
 #include <grpc/support/time.h>
+
+#include "src/core/lib/gpr/host_port.h"
 #include "src/core/lib/gpr/string.h"
 #include "src/core/lib/iomgr/block_annotate.h"
 #include "src/core/lib/iomgr/executor.h"
diff --git a/src/core/lib/iomgr/sockaddr_utils.cc b/src/core/lib/iomgr/sockaddr_utils.cc
index 71e3e38624..ac97af4dee 100644
--- a/src/core/lib/iomgr/sockaddr_utils.cc
+++ b/src/core/lib/iomgr/sockaddr_utils.cc
@@ -23,11 +23,11 @@
 #include <string.h>
 
 #include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
 #include <grpc/support/string_util.h>
 
+#include "src/core/lib/gpr/host_port.h"
 #include "src/core/lib/gpr/string.h"
 #include "src/core/lib/iomgr/sockaddr.h"
 #include "src/core/lib/iomgr/socket_utils.h"
diff --git a/src/core/lib/iomgr/socket_utils_common_posix.cc b/src/core/lib/iomgr/socket_utils_common_posix.cc
index 5068a8081d..d02d77eb02 100644
--- a/src/core/lib/iomgr/socket_utils_common_posix.cc
+++ b/src/core/lib/iomgr/socket_utils_common_posix.cc
@@ -36,10 +36,11 @@
 #include <unistd.h>
 
 #include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/port_platform.h>
 #include <grpc/support/sync.h>
+
+#include "src/core/lib/gpr/host_port.h"
 #include "src/core/lib/gpr/string.h"
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 
diff --git a/src/core/lib/iomgr/tcp_posix.cc b/src/core/lib/iomgr/tcp_posix.cc
index 0ec5926227..07aed2d1fd 100644
--- a/src/core/lib/iomgr/tcp_posix.cc
+++ b/src/core/lib/iomgr/tcp_posix.cc
@@ -130,7 +130,7 @@ static void run_poller(void* bp, grpc_error* error_ignored) {
     gpr_log(GPR_DEBUG, "BACKUP_POLLER:%p run", p);
   }
   gpr_mu_lock(p->pollset_mu);
-  grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 13 * GPR_MS_PER_SEC;
+  grpc_millis deadline = grpc_core::ExecCtx::Get()->Now() + 10 * GPR_MS_PER_SEC;
   GRPC_STATS_INC_TCP_BACKUP_POLLER_POLLS();
   GRPC_LOG_IF_ERROR(
       "backup_poller:pollset_work",
@@ -368,6 +368,7 @@ static void call_read_cb(grpc_tcp* tcp, grpc_error* error) {
 
 #define MAX_READ_IOVEC 4
 static void tcp_do_read(grpc_tcp* tcp) {
+  GPR_TIMER_SCOPE("tcp_continue_read", 0);
   struct msghdr msg;
   struct iovec iov[MAX_READ_IOVEC];
   ssize_t read_bytes;
@@ -375,7 +376,6 @@ static void tcp_do_read(grpc_tcp* tcp) {
 
   GPR_ASSERT(!tcp->finished_edge);
   GPR_ASSERT(tcp->incoming_buffer->count <= MAX_READ_IOVEC);
-  GPR_TIMER_BEGIN("tcp_continue_read", 0);
 
   for (i = 0; i < tcp->incoming_buffer->count; i++) {
     iov[i].iov_base = GRPC_SLICE_START_PTR(tcp->incoming_buffer->slices[i]);
@@ -393,12 +393,11 @@ static void tcp_do_read(grpc_tcp* tcp) {
   GRPC_STATS_INC_TCP_READ_OFFER(tcp->incoming_buffer->length);
   GRPC_STATS_INC_TCP_READ_OFFER_IOV_SIZE(tcp->incoming_buffer->count);
 
-  GPR_TIMER_BEGIN("recvmsg", 0);
   do {
+    GPR_TIMER_SCOPE("recvmsg", 0);
     GRPC_STATS_INC_SYSCALL_READ();
     read_bytes = recvmsg(tcp->fd, &msg, 0);
   } while (read_bytes < 0 && errno == EINTR);
-  GPR_TIMER_END("recvmsg", read_bytes >= 0);
 
   if (read_bytes < 0) {
     /* NB: After calling call_read_cb a parallel call of the read handler may
@@ -434,8 +433,6 @@ static void tcp_do_read(grpc_tcp* tcp) {
     call_read_cb(tcp, GRPC_ERROR_NONE);
     TCP_UNREF(tcp, "read");
   }
-
-  GPR_TIMER_END("tcp_continue_read", 0);
 }
 
 static void tcp_read_allocation_done(void* tcpp, grpc_error* error) {
@@ -552,13 +549,12 @@ static bool tcp_flush(grpc_tcp* tcp, grpc_error** error) {
     GRPC_STATS_INC_TCP_WRITE_SIZE(sending_length);
     GRPC_STATS_INC_TCP_WRITE_IOV_SIZE(iov_size);
 
-    GPR_TIMER_BEGIN("sendmsg", 1);
+    GPR_TIMER_SCOPE("sendmsg", 1);
     do {
       /* TODO(klempner): Cork if this is a partial write */
       GRPC_STATS_INC_SYSCALL_WRITE();
       sent_length = sendmsg(tcp->fd, &msg, SENDMSG_FLAGS);
     } while (sent_length < 0 && errno == EINTR);
-    GPR_TIMER_END("sendmsg", 0);
 
     if (sent_length < 0) {
       if (errno == EAGAIN) {
@@ -637,6 +633,7 @@ static void tcp_handle_write(void* arg /* grpc_tcp */, grpc_error* error) {
 
 static void tcp_write(grpc_endpoint* ep, grpc_slice_buffer* buf,
                       grpc_closure* cb) {
+  GPR_TIMER_SCOPE("tcp_write", 0);
   grpc_tcp* tcp = (grpc_tcp*)ep;
   grpc_error* error = GRPC_ERROR_NONE;
 
@@ -651,11 +648,9 @@ static void tcp_write(grpc_endpoint* ep, grpc_slice_buffer* buf,
     }
   }
 
-  GPR_TIMER_BEGIN("tcp_write", 0);
   GPR_ASSERT(tcp->write_cb == nullptr);
 
   if (buf->length == 0) {
-    GPR_TIMER_END("tcp_write", 0);
     GRPC_CLOSURE_SCHED(
         cb, grpc_fd_is_shutdown(tcp->em_fd)
                 ? tcp_annotate_error(
@@ -680,8 +675,6 @@ static void tcp_write(grpc_endpoint* ep, grpc_slice_buffer* buf,
     }
     GRPC_CLOSURE_SCHED(cb, error);
   }
-
-  GPR_TIMER_END("tcp_write", 0);
 }
 
 static void tcp_add_to_pollset(grpc_endpoint* ep, grpc_pollset* pollset) {
diff --git a/src/core/lib/iomgr/wakeup_fd_eventfd.cc b/src/core/lib/iomgr/wakeup_fd_eventfd.cc
index 81cb7ee280..421ac55b00 100644
--- a/src/core/lib/iomgr/wakeup_fd_eventfd.cc
+++ b/src/core/lib/iomgr/wakeup_fd_eventfd.cc
@@ -52,15 +52,14 @@ static grpc_error* eventfd_consume(grpc_wakeup_fd* fd_info) {
 }
 
 static grpc_error* eventfd_wakeup(grpc_wakeup_fd* fd_info) {
+  GPR_TIMER_SCOPE("eventfd_wakeup", 0);
   int err;
-  GPR_TIMER_BEGIN("eventfd_wakeup", 0);
   do {
     err = eventfd_write(fd_info->read_fd, 1);
   } while (err < 0 && errno == EINTR);
   if (err < 0) {
     return GRPC_OS_ERROR(errno, "eventfd_write");
   }
-  GPR_TIMER_END("eventfd_wakeup", 0);
   return GRPC_ERROR_NONE;
 }
 
diff --git a/src/core/lib/profiling/timers.h b/src/core/lib/profiling/timers.h
index 9f11f771e6..d0188b5054 100644
--- a/src/core/lib/profiling/timers.h
+++ b/src/core/lib/profiling/timers.h
@@ -40,14 +40,10 @@ void gpr_timer_set_enabled(int enabled);
   do {                                 \
   } while (0)
 
-#define GPR_TIMER_BEGIN(tag, important) \
+#define GPR_TIMER_SCOPE(tag, important) \
   do {                                  \
   } while (0)
 
-#define GPR_TIMER_END(tag, important) \
-  do {                                \
-  } while (0)
-
 #else /* at least one profiler requested... */
 /* ... hopefully only one. */
 #if defined(GRPC_STAP_PROFILER) && defined(GRPC_BASIC_PROFILER)
@@ -64,12 +60,6 @@ void gpr_timer_set_enabled(int enabled);
 #define GPR_TIMER_MARK(tag, important) \
   gpr_timer_add_mark(tag, important, __FILE__, __LINE__);
 
-#define GPR_TIMER_BEGIN(tag, important) \
-  gpr_timer_begin(tag, important, __FILE__, __LINE__);
-
-#define GPR_TIMER_END(tag, important) \
-  gpr_timer_end(tag, important, __FILE__, __LINE__);
-
 #ifdef GRPC_STAP_PROFILER
 /* Empty placeholder for now. */
 #endif /* GRPC_STAP_PROFILER */
@@ -78,10 +68,6 @@ void gpr_timer_set_enabled(int enabled);
 /* Empty placeholder for now. */
 #endif /* GRPC_BASIC_PROFILER */
 
-#endif /* at least one profiler requested. */
-
-#if (defined(GRPC_STAP_PROFILER) + defined(GRPC_BASIC_PROFILER) + \
-     defined(GRPC_CUSTOM_PROFILER))
 namespace grpc {
 class ProfileScope {
  public:
@@ -99,10 +85,7 @@ class ProfileScope {
 #define GPR_TIMER_SCOPE(tag, important)                                        \
   ::grpc::ProfileScope _profile_scope_##__LINE__((tag), (important), __FILE__, \
                                                  __LINE__)
-#else
-#define GPR_TIMER_SCOPE(tag, important) \
-  do {                                  \
-  } while (false)
-#endif
+
+#endif /* at least one profiler requested. */
 
 #endif /* GRPC_CORE_LIB_PROFILING_TIMERS_H */
diff --git a/src/core/lib/security/transport/client_auth_filter.cc b/src/core/lib/security/transport/client_auth_filter.cc
index 045cb3e239..802503c868 100644
--- a/src/core/lib/security/transport/client_auth_filter.cc
+++ b/src/core/lib/security/transport/client_auth_filter.cc
@@ -118,6 +118,7 @@ static void on_credentials_metadata(void* arg, grpc_error* input_error) {
     grpc_transport_stream_op_batch_finish_with_failure(batch, error,
                                                        calld->call_combiner);
   }
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "get_request_metadata");
 }
 
 void grpc_auth_metadata_context_build(
@@ -208,7 +209,7 @@ static void send_security_metadata(grpc_call_element* elem,
       chand->auth_context, &calld->auth_md_context);
 
   GPR_ASSERT(calld->pollent != nullptr);
-
+  GRPC_CALL_STACK_REF(calld->owning_call, "get_request_metadata");
   GRPC_CLOSURE_INIT(&calld->async_result_closure, on_credentials_metadata,
                     batch, grpc_schedule_on_exec_ctx);
   grpc_error* error = GRPC_ERROR_NONE;
@@ -250,6 +251,7 @@ static void on_host_checked(void* arg, grpc_error* error) {
         calld->call_combiner);
     gpr_free(error_msg);
   }
+  GRPC_CALL_STACK_UNREF(calld->owning_call, "check_call_host");
 }
 
 static void cancel_check_call_host(void* arg, grpc_error* error) {
@@ -266,7 +268,7 @@ static void cancel_check_call_host(void* arg, grpc_error* error) {
 
 static void auth_start_transport_stream_op_batch(
     grpc_call_element* elem, grpc_transport_stream_op_batch* batch) {
-  GPR_TIMER_BEGIN("auth_start_transport_stream_op_batch", 0);
+  GPR_TIMER_SCOPE("auth_start_transport_stream_op_batch", 0);
 
   /* grab pointers to our data from the call element */
   call_data* calld = (call_data*)elem->call_data;
@@ -312,6 +314,7 @@ static void auth_start_transport_stream_op_batch(
     }
     if (calld->have_host) {
       batch->handler_private.extra_arg = elem;
+      GRPC_CALL_STACK_REF(calld->owning_call, "check_call_host");
       GRPC_CLOSURE_INIT(&calld->async_result_closure, on_host_checked, batch,
                         grpc_schedule_on_exec_ctx);
       char* call_host = grpc_slice_to_c_string(calld->host);
@@ -332,14 +335,12 @@ static void auth_start_transport_stream_op_batch(
                               grpc_schedule_on_exec_ctx));
       }
       gpr_free(call_host);
-      GPR_TIMER_END("auth_start_transport_stream_op_batch", 0);
       return; /* early exit */
     }
   }
 
   /* pass control down the stack */
   grpc_call_next_op(elem, batch);
-  GPR_TIMER_END("auth_start_transport_stream_op_batch", 0);
 }
 
 /* Constructor for call_data */
diff --git a/src/core/lib/security/transport/secure_endpoint.cc b/src/core/lib/security/transport/secure_endpoint.cc
index bd8a6cd76a..9eaa299897 100644
--- a/src/core/lib/security/transport/secure_endpoint.cc
+++ b/src/core/lib/security/transport/secure_endpoint.cc
@@ -252,7 +252,7 @@ static void flush_write_staging_buffer(secure_endpoint* ep, uint8_t** cur,
 
 static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
                            grpc_closure* cb) {
-  GPR_TIMER_BEGIN("secure_endpoint.endpoint_write", 0);
+  GPR_TIMER_SCOPE("secure_endpoint.endpoint_write", 0);
 
   unsigned i;
   tsi_result result = TSI_OK;
@@ -336,12 +336,10 @@ static void endpoint_write(grpc_endpoint* secure_ep, grpc_slice_buffer* slices,
     GRPC_CLOSURE_SCHED(
         cb, grpc_set_tsi_error_result(
                 GRPC_ERROR_CREATE_FROM_STATIC_STRING("Wrap failed"), result));
-    GPR_TIMER_END("secure_endpoint.endpoint_write", 0);
     return;
   }
 
   grpc_endpoint_write(ep->wrapped_ep, &ep->output_buffer, cb);
-  GPR_TIMER_END("secure_endpoint.endpoint_write", 0);
 }
 
 static void endpoint_shutdown(grpc_endpoint* secure_ep, grpc_error* why) {
diff --git a/src/core/lib/security/transport/security_connector.cc b/src/core/lib/security/transport/security_connector.cc
index 1d962f94b2..fd632bdbab 100644
--- a/src/core/lib/security/transport/security_connector.cc
+++ b/src/core/lib/security/transport/security_connector.cc
@@ -23,7 +23,6 @@
 
 #include <grpc/slice_buffer.h>
 #include <grpc/support/alloc.h>
-#include <grpc/support/host_port.h>
 #include <grpc/support/log.h>
 #include <grpc/support/string_util.h>
 
@@ -31,6 +30,7 @@
 #include "src/core/lib/channel/channel_args.h"
 #include "src/core/lib/channel/handshaker.h"
 #include "src/core/lib/gpr/env.h"
+#include "src/core/lib/gpr/host_port.h"
 #include "src/core/lib/gpr/string.h"
 #include "src/core/lib/iomgr/load_file.h"
 #include "src/core/lib/security/context/security_context.h"
diff --git a/src/core/lib/slice/slice_intern.cc b/src/core/lib/slice/slice_intern.cc
index fe1770b92c..cf471f30f8 100644
--- a/src/core/lib/slice/slice_intern.cc
+++ b/src/core/lib/slice/slice_intern.cc
@@ -122,13 +122,13 @@ static const grpc_slice_refcount_vtable interned_slice_sub_vtable = {
     grpc_slice_default_eq_impl, grpc_slice_default_hash_impl};
 
 static void grow_shard(slice_shard* shard) {
+  GPR_TIMER_SCOPE("grow_strtab", 0);
+
   size_t capacity = shard->capacity * 2;
   size_t i;
   interned_slice_refcount** strtab;
   interned_slice_refcount *s, *next;
 
-  GPR_TIMER_BEGIN("grow_strtab", 0);
-
   strtab = (interned_slice_refcount**)gpr_zalloc(
       sizeof(interned_slice_refcount*) * capacity);
 
@@ -140,12 +140,9 @@ static void grow_shard(slice_shard* shard) {
       strtab[idx] = s;
     }
   }
-
   gpr_free(shard->strs);
   shard->strs = strtab;
   shard->capacity = capacity;
-
-  GPR_TIMER_END("grow_strtab", 0);
 }
 
 static grpc_slice materialize(interned_slice_refcount* s) {
@@ -200,9 +197,8 @@ bool grpc_slice_is_interned(grpc_slice slice) {
 }
 
 grpc_slice grpc_slice_intern(grpc_slice slice) {
-  GPR_TIMER_BEGIN("grpc_slice_intern", 0);
+  GPR_TIMER_SCOPE("grpc_slice_intern", 0);
   if (GRPC_IS_STATIC_METADATA_STRING(slice)) {
-    GPR_TIMER_END("grpc_slice_intern", 0);
     return slice;
   }
 
@@ -212,7 +208,6 @@ grpc_slice grpc_slice_intern(grpc_slice slice) {
         static_metadata_hash[(hash + i) % GPR_ARRAY_SIZE(static_metadata_hash)];
     if (ent.hash == hash && ent.idx < GRPC_STATIC_MDSTR_COUNT &&
         grpc_slice_eq(grpc_static_slice_table[ent.idx], slice)) {
-      GPR_TIMER_END("grpc_slice_intern", 0);
       return grpc_static_slice_table[ent.idx];
     }
   }
@@ -235,7 +230,6 @@ grpc_slice grpc_slice_intern(grpc_slice slice) {
         /* and treat this as if we were never here... sshhh */
       } else {
         gpr_mu_unlock(&shard->mu);
-        GPR_TIMER_END("grpc_slice_intern", 0);
         return materialize(s);
       }
     }
@@ -264,7 +258,6 @@ grpc_slice grpc_slice_intern(grpc_slice slice) {
 
   gpr_mu_unlock(&shard->mu);
 
-  GPR_TIMER_END("grpc_slice_intern", 0);
   return materialize(s);
 }
 
diff --git a/src/core/lib/surface/alarm.cc b/src/core/lib/surface/alarm.cc
deleted file mode 100644
index f6ea016c33..0000000000
--- a/src/core/lib/surface/alarm.cc
+++ /dev/null
@@ -1,137 +0,0 @@
-/*
- *
- * Copyright 2015 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-#include <grpc/support/port_platform.h>
-
-#include <inttypes.h>
-
-#include "src/core/lib/surface/alarm_internal.h"
-
-#include <grpc/grpc.h>
-#include <grpc/support/alloc.h>
-#include <grpc/support/log.h>
-#include "src/core/lib/iomgr/timer.h"
-#include "src/core/lib/surface/completion_queue.h"
-
-grpc_core::DebugOnlyTraceFlag grpc_trace_alarm_refcount(false,
-                                                        "alarm_refcount");
-
-struct grpc_alarm {
-  gpr_refcount refs;
-  grpc_timer alarm;
-  grpc_closure on_alarm;
-  grpc_cq_completion completion;
-  /** completion queue where events about this alarm will be posted */
-  grpc_completion_queue* cq;
-  /** user supplied tag */
-  void* tag;
-};
-
-static void alarm_ref(grpc_alarm* alarm) { gpr_ref(&alarm->refs); }
-
-static void alarm_unref(grpc_alarm* alarm) {
-  if (gpr_unref(&alarm->refs)) {
-    grpc_core::ExecCtx exec_ctx;
-    if (alarm->cq != nullptr) {
-      GRPC_CQ_INTERNAL_UNREF(alarm->cq, "alarm");
-    }
-
-    gpr_free(alarm);
-  }
-}
-
-#ifndef NDEBUG
-static void alarm_ref_dbg(grpc_alarm* alarm, const char* reason,
-                          const char* file, int line) {
-  if (grpc_trace_alarm_refcount.enabled()) {
-    gpr_atm val = gpr_atm_no_barrier_load(&alarm->refs.count);
-    gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
-            "Alarm:%p  ref %" PRIdPTR " -> %" PRIdPTR " %s", alarm, val,
-            val + 1, reason);
-  }
-
-  alarm_ref(alarm);
-}
-
-static void alarm_unref_dbg(grpc_alarm* alarm, const char* reason,
-                            const char* file, int line) {
-  if (grpc_trace_alarm_refcount.enabled()) {
-    gpr_atm val = gpr_atm_no_barrier_load(&alarm->refs.count);
-    gpr_log(file, line, GPR_LOG_SEVERITY_DEBUG,
-            "Alarm:%p  Unref %" PRIdPTR " -> %" PRIdPTR " %s", alarm, val,
-            val - 1, reason);
-  }
-
-  alarm_unref(alarm);
-}
-#endif
-
-static void alarm_end_completion(void* arg, grpc_cq_completion* c) {
-  grpc_alarm* alarm = (grpc_alarm*)arg;
-  GRPC_ALARM_UNREF(alarm, "dequeue-end-op");
-}
-
-static void alarm_cb(void* arg, grpc_error* error) {
-  grpc_alarm* alarm = (grpc_alarm*)arg;
-
-  /* We are queuing an op on completion queue. This means, the alarm's structure
-     cannot be destroyed until the op is dequeued. Adding an extra ref
-     here and unref'ing when the op is dequeued will achieve this */
-  GRPC_ALARM_REF(alarm, "queue-end-op");
-  grpc_cq_end_op(alarm->cq, alarm->tag, error, alarm_end_completion,
-                 (void*)alarm, &alarm->completion);
-}
-
-grpc_alarm* grpc_alarm_create(void* reserved) {
-  grpc_alarm* alarm = (grpc_alarm*)gpr_malloc(sizeof(grpc_alarm));
-
-#ifndef NDEBUG
-  if (grpc_trace_alarm_refcount.enabled()) {
-    gpr_log(GPR_DEBUG, "Alarm:%p created (ref: 1)", alarm);
-  }
-#endif
-
-  gpr_ref_init(&alarm->refs, 1);
-  grpc_timer_init_unset(&alarm->alarm);
-  alarm->cq = nullptr;
-  GRPC_CLOSURE_INIT(&alarm->on_alarm, alarm_cb, alarm,
-                    grpc_schedule_on_exec_ctx);
-  return alarm;
-}
-
-void grpc_alarm_set(grpc_alarm* alarm, grpc_completion_queue* cq,
-                    gpr_timespec deadline, void* tag, void* reserved) {
-  grpc_core::ExecCtx exec_ctx;
-
-  GRPC_CQ_INTERNAL_REF(cq, "alarm");
-  alarm->cq = cq;
-  alarm->tag = tag;
-
-  GPR_ASSERT(grpc_cq_begin_op(cq, tag));
-  grpc_timer_init(&alarm->alarm, grpc_timespec_to_millis_round_up(deadline),
-                  &alarm->on_alarm);
-}
-
-void grpc_alarm_cancel(grpc_alarm* alarm, void* reserved) {
-  grpc_core::ExecCtx exec_ctx;
-  grpc_timer_cancel(&alarm->alarm);
-}
-
-void grpc_alarm_destroy(grpc_alarm* alarm, void* reserved) {
-  grpc_alarm_cancel(alarm, reserved);
-  GRPC_ALARM_UNREF(alarm, "alarm_destroy");
-}
diff --git a/src/core/lib/surface/alarm_internal.h b/src/core/lib/surface/alarm_internal.h
deleted file mode 100644
index 99e981234d..0000000000
--- a/src/core/lib/surface/alarm_internal.h
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- *
- * Copyright 2015-2017 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-#ifndef GRPC_CORE_LIB_SURFACE_ALARM_INTERNAL_H
-#define GRPC_CORE_LIB_SURFACE_ALARM_INTERNAL_H
-
-#include <grpc/support/log.h>
-#include "src/core/lib/debug/trace.h"
-
-extern grpc_core::DebugOnlyTraceFlag grpc_trace_alarm_refcount;
-
-#ifndef NDEBUG
-
-#define GRPC_ALARM_REF(a, reason) alarm_ref_dbg(a, reason, __FILE__, __LINE__)
-#define GRPC_ALARM_UNREF(a, reason) \
-  alarm_unref_dbg(a, reason, __FILE__, __LINE__)
-
-#else /* !defined(NDEBUG) */
-
-#define GRPC_ALARM_REF(a, reason) alarm_ref(a)
-#define GRPC_ALARM_UNREF(a, reason) alarm_unref(a)
-
-#endif /* defined(NDEBUG) */
-
-#endif /* GRPC_CORE_LIB_SURFACE_ALARM_INTERNAL_H */
diff --git a/src/core/lib/surface/call.cc b/src/core/lib/surface/call.cc
index ce63fa4d67..b538cc0212 100644
--- a/src/core/lib/surface/call.cc
+++ b/src/core/lib/surface/call.cc
@@ -321,12 +321,12 @@ static parent_call* get_parent_call(grpc_call* call) {
 
 grpc_error* grpc_call_create(const grpc_call_create_args* args,
                              grpc_call** out_call) {
+  GPR_TIMER_SCOPE("grpc_call_create", 0);
   size_t i, j;
   grpc_error* error = GRPC_ERROR_NONE;
   grpc_channel_stack* channel_stack =
       grpc_channel_get_channel_stack(args->channel);
   grpc_call* call;
-  GPR_TIMER_BEGIN("grpc_call_create", 0);
   size_t initial_size = grpc_channel_get_call_size_estimate(args->channel);
   GRPC_STATS_INC_CALL_INITIAL_SIZE(initial_size);
   gpr_arena* arena = gpr_arena_create(initial_size);
@@ -467,7 +467,6 @@ grpc_error* grpc_call_create(const grpc_call_create_args* args,
 
   grpc_slice_unref_internal(path);
 
-  GPR_TIMER_END("grpc_call_create", 0);
   return error;
 }
 
@@ -511,10 +510,10 @@ static void release_call(void* call, grpc_error* error) {
 
 static void set_status_value_directly(grpc_status_code status, void* dest);
 static void destroy_call(void* call, grpc_error* error) {
+  GPR_TIMER_SCOPE("destroy_call", 0);
   size_t i;
   int ii;
   grpc_call* c = (grpc_call*)call;
-  GPR_TIMER_BEGIN("destroy_call", 0);
   for (i = 0; i < 2; i++) {
     grpc_metadata_batch_destroy(
         &c->metadata_batch[1 /* is_receiving */][i /* is_initial */]);
@@ -551,7 +550,6 @@ static void destroy_call(void* call, grpc_error* error) {
   grpc_call_stack_destroy(CALL_STACK_FROM_CALL(c), &c->final_info,
                           GRPC_CLOSURE_INIT(&c->release_call, release_call, c,
                                             grpc_schedule_on_exec_ctx));
-  GPR_TIMER_END("destroy_call", 0);
 }
 
 void grpc_call_ref(grpc_call* c) { gpr_ref(&c->ext_ref); }
@@ -559,10 +557,11 @@ void grpc_call_ref(grpc_call* c) { gpr_ref(&c->ext_ref); }
 void grpc_call_unref(grpc_call* c) {
   if (!gpr_unref(&c->ext_ref)) return;
 
+  GPR_TIMER_SCOPE("grpc_call_unref", 0);
+
   child_call* cc = c->child;
   grpc_core::ExecCtx exec_ctx;
 
-  GPR_TIMER_BEGIN("grpc_call_unref", 0);
   GRPC_API_TRACE("grpc_call_unref(c=%p)", 1, (c));
 
   if (cc) {
@@ -594,8 +593,6 @@ void grpc_call_unref(grpc_call* c) {
     grpc_call_combiner_set_notify_on_cancel(&c->call_combiner, nullptr);
   }
   GRPC_CALL_INTERNAL_UNREF(c, "destroy");
-
-  GPR_TIMER_END("grpc_call_unref", 0);
 }
 
 grpc_call_error grpc_call_cancel(grpc_call* call, void* reserved) {
@@ -610,13 +607,12 @@ grpc_call_error grpc_call_cancel(grpc_call* call, void* reserved) {
 // This is called via the call combiner to start sending a batch down
 // the filter stack.
 static void execute_batch_in_call_combiner(void* arg, grpc_error* ignored) {
+  GPR_TIMER_SCOPE("execute_batch", 0);
   grpc_transport_stream_op_batch* batch = (grpc_transport_stream_op_batch*)arg;
   grpc_call* call = (grpc_call*)batch->handler_private.extra_arg;
-  GPR_TIMER_BEGIN("execute_batch", 0);
   grpc_call_element* elem = CALL_ELEM_FROM_CALL(call, 0);
   GRPC_CALL_LOG_OP(GPR_INFO, elem, batch);
   elem->filter->start_transport_stream_op_batch(elem, batch);
-  GPR_TIMER_END("execute_batch", 0);
 }
 
 // start_batch_closure points to a caller-allocated closure to be used
@@ -1036,7 +1032,8 @@ static grpc_stream_compression_algorithm decode_stream_compression(
 static void publish_app_metadata(grpc_call* call, grpc_metadata_batch* b,
                                  int is_trailing) {
   if (b->list.count == 0) return;
-  GPR_TIMER_BEGIN("publish_app_metadata", 0);
+  if (is_trailing && call->buffered_metadata[1] == nullptr) return;
+  GPR_TIMER_SCOPE("publish_app_metadata", 0);
   grpc_metadata_array* dest;
   grpc_metadata* mdusr;
   dest = call->buffered_metadata[is_trailing];
@@ -1052,39 +1049,34 @@ static void publish_app_metadata(grpc_call* call, grpc_metadata_batch* b,
     mdusr->key = GRPC_MDKEY(l->md);
     mdusr->value = GRPC_MDVALUE(l->md);
   }
-  GPR_TIMER_END("publish_app_metadata", 0);
 }
 
 static void recv_initial_filter(grpc_call* call, grpc_metadata_batch* b) {
   if (b->idx.named.content_encoding != nullptr) {
-    GPR_TIMER_BEGIN("incoming_stream_compression_algorithm", 0);
+    GPR_TIMER_SCOPE("incoming_stream_compression_algorithm", 0);
     set_incoming_stream_compression_algorithm(
         call, decode_stream_compression(b->idx.named.content_encoding->md));
-    GPR_TIMER_END("incoming_stream_compression_algorithm", 0);
     grpc_metadata_batch_remove(b, b->idx.named.content_encoding);
   }
   if (b->idx.named.grpc_encoding != nullptr) {
-    GPR_TIMER_BEGIN("incoming_message_compression_algorithm", 0);
+    GPR_TIMER_SCOPE("incoming_message_compression_algorithm", 0);
     set_incoming_message_compression_algorithm(
         call, decode_message_compression(b->idx.named.grpc_encoding->md));
-    GPR_TIMER_END("incoming_message_compression_algorithm", 0);
     grpc_metadata_batch_remove(b, b->idx.named.grpc_encoding);
   }
   uint32_t message_encodings_accepted_by_peer = 1u;
   uint32_t stream_encodings_accepted_by_peer = 1u;
   if (b->idx.named.grpc_accept_encoding != nullptr) {
-    GPR_TIMER_BEGIN("encodings_accepted_by_peer", 0);
+    GPR_TIMER_SCOPE("encodings_accepted_by_peer", 0);
     set_encodings_accepted_by_peer(call, b->idx.named.grpc_accept_encoding->md,
                                    &message_encodings_accepted_by_peer, false);
     grpc_metadata_batch_remove(b, b->idx.named.grpc_accept_encoding);
-    GPR_TIMER_END("encodings_accepted_by_peer", 0);
   }
   if (b->idx.named.accept_encoding != nullptr) {
-    GPR_TIMER_BEGIN("stream_encodings_accepted_by_peer", 0);
+    GPR_TIMER_SCOPE("stream_encodings_accepted_by_peer", 0);
     set_encodings_accepted_by_peer(call, b->idx.named.accept_encoding->md,
                                    &stream_encodings_accepted_by_peer, true);
     grpc_metadata_batch_remove(b, b->idx.named.accept_encoding);
-    GPR_TIMER_END("stream_encodings_accepted_by_peer", 0);
   }
   call->encodings_accepted_by_peer =
       grpc_compression_bitset_from_message_stream_compression_bitset(
@@ -1523,9 +1515,8 @@ static void receiving_initial_metadata_ready(void* bctlp, grpc_error* error) {
     recv_initial_filter(call, md);
 
     /* TODO(ctiller): this could be moved into recv_initial_filter now */
-    GPR_TIMER_BEGIN("validate_filtered_metadata", 0);
+    GPR_TIMER_SCOPE("validate_filtered_metadata", 0);
     validate_filtered_metadata(bctl);
-    GPR_TIMER_END("validate_filtered_metadata", 0);
 
     if (md->deadline != GRPC_MILLIS_INF_FUTURE && !call->is_client) {
       call->send_deadline = md->deadline;
@@ -1578,6 +1569,8 @@ static void free_no_op_completion(void* p, grpc_cq_completion* completion) {
 static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
                                         size_t nops, void* notify_tag,
                                         int is_notify_tag_closure) {
+  GPR_TIMER_SCOPE("grpc_call_start_batch", 0);
+
   size_t i;
   const grpc_op* op;
   batch_control* bctl;
@@ -1586,7 +1579,6 @@ static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
   grpc_transport_stream_op_batch* stream_op;
   grpc_transport_stream_op_batch_payload* stream_op_payload;
 
-  GPR_TIMER_BEGIN("grpc_call_start_batch", 0);
   GRPC_CALL_LOG_BATCH(GPR_INFO, call, ops, nops, notify_tag);
 
   if (nops == 0) {
@@ -1923,7 +1915,6 @@ static grpc_call_error call_start_batch(grpc_call* call, const grpc_op* ops,
   execute_batch(call, stream_op, &bctl->start_batch);
 
 done:
-  GPR_TIMER_END("grpc_call_start_batch", 0);
   return error;
 
 done_with_error:
diff --git a/src/core/lib/surface/completion_queue.cc b/src/core/lib/surface/completion_queue.cc
index 27f67054e4..a2c52082c2 100644
--- a/src/core/lib/surface/completion_queue.cc
+++ b/src/core/lib/surface/completion_queue.cc
@@ -421,9 +421,9 @@ static long cq_event_queue_num_items(grpc_cq_event_queue* q) {
 grpc_completion_queue* grpc_completion_queue_create_internal(
     grpc_cq_completion_type completion_type,
     grpc_cq_polling_type polling_type) {
-  grpc_completion_queue* cq;
+  GPR_TIMER_SCOPE("grpc_completion_queue_create_internal", 0);
 
-  GPR_TIMER_BEGIN("grpc_completion_queue_create_internal", 0);
+  grpc_completion_queue* cq;
 
   GRPC_API_TRACE(
       "grpc_completion_queue_create_internal(completion_type=%d, "
@@ -452,9 +452,6 @@ grpc_completion_queue* grpc_completion_queue_create_internal(
 
   GRPC_CLOSURE_INIT(&cq->pollset_shutdown_done, on_pollset_shutdown_done, cq,
                     grpc_schedule_on_exec_ctx);
-
-  GPR_TIMER_END("grpc_completion_queue_create_internal", 0);
-
   return cq;
 }
 
@@ -622,7 +619,7 @@ static void cq_end_op_for_next(grpc_completion_queue* cq, void* tag,
                                void (*done)(void* done_arg,
                                             grpc_cq_completion* storage),
                                void* done_arg, grpc_cq_completion* storage) {
-  GPR_TIMER_BEGIN("cq_end_op_for_next", 0);
+  GPR_TIMER_SCOPE("cq_end_op_for_next", 0);
 
   if (grpc_api_trace.enabled() ||
       (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE)) {
@@ -691,8 +688,6 @@ static void cq_end_op_for_next(grpc_completion_queue* cq, void* tag,
     }
   }
 
-  GPR_TIMER_END("cq_end_op_for_next", 0);
-
   GRPC_ERROR_UNREF(error);
 }
 
@@ -704,11 +699,11 @@ static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
                                 void (*done)(void* done_arg,
                                              grpc_cq_completion* storage),
                                 void* done_arg, grpc_cq_completion* storage) {
+  GPR_TIMER_SCOPE("cq_end_op_for_pluck", 0);
+
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
   int is_success = (error == GRPC_ERROR_NONE);
 
-  GPR_TIMER_BEGIN("cq_end_op_for_pluck", 0);
-
   if (grpc_api_trace.enabled() ||
       (grpc_trace_operation_failures.enabled() && error != GRPC_ERROR_NONE)) {
     const char* errmsg = grpc_error_string(error);
@@ -760,8 +755,6 @@ static void cq_end_op_for_pluck(grpc_completion_queue* cq, void* tag,
     }
   }
 
-  GPR_TIMER_END("cq_end_op_for_pluck", 0);
-
   GRPC_ERROR_UNREF(error);
 }
 
@@ -840,11 +833,11 @@ static void dump_pending_tags(grpc_completion_queue* cq) {}
 
 static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
                           void* reserved) {
+  GPR_TIMER_SCOPE("grpc_completion_queue_next", 0);
+
   grpc_event ret;
   cq_next_data* cqd = (cq_next_data*)DATA_FROM_CQ(cq);
 
-  GPR_TIMER_BEGIN("grpc_completion_queue_next", 0);
-
   GRPC_API_TRACE(
       "grpc_completion_queue_next("
       "cq=%p, "
@@ -958,8 +951,6 @@ static grpc_event cq_next(grpc_completion_queue* cq, gpr_timespec deadline,
 
   GPR_ASSERT(is_finished_arg.stolen_completion == nullptr);
 
-  GPR_TIMER_END("grpc_completion_queue_next", 0);
-
   return ret;
 }
 
@@ -1078,14 +1069,14 @@ class ExecCtxPluck : public grpc_core::ExecCtx {
 
 static grpc_event cq_pluck(grpc_completion_queue* cq, void* tag,
                            gpr_timespec deadline, void* reserved) {
+  GPR_TIMER_SCOPE("grpc_completion_queue_pluck", 0);
+
   grpc_event ret;
   grpc_cq_completion* c;
   grpc_cq_completion* prev;
   grpc_pollset_worker* worker = nullptr;
   cq_pluck_data* cqd = (cq_pluck_data*)DATA_FROM_CQ(cq);
 
-  GPR_TIMER_BEGIN("grpc_completion_queue_pluck", 0);
-
   if (grpc_cq_pluck_trace.enabled()) {
     GRPC_API_TRACE(
         "grpc_completion_queue_pluck("
@@ -1191,8 +1182,6 @@ done:
 
   GPR_ASSERT(is_finished_arg.stolen_completion == nullptr);
 
-  GPR_TIMER_END("grpc_completion_queue_pluck", 0);
-
   return ret;
 }
 
@@ -1240,23 +1229,19 @@ static void cq_shutdown_pluck(grpc_completion_queue* cq) {
 /* Shutdown simply drops a ref that we reserved at creation time; if we drop
    to zero here, then enter shutdown mode and wake up any waiters */
 void grpc_completion_queue_shutdown(grpc_completion_queue* cq) {
+  GPR_TIMER_SCOPE("grpc_completion_queue_shutdown", 0);
   grpc_core::ExecCtx exec_ctx;
-  GPR_TIMER_BEGIN("grpc_completion_queue_shutdown", 0);
   GRPC_API_TRACE("grpc_completion_queue_shutdown(cq=%p)", 1, (cq));
   cq->vtable->shutdown(cq);
-
-  GPR_TIMER_END("grpc_completion_queue_shutdown", 0);
 }
 
 void grpc_completion_queue_destroy(grpc_completion_queue* cq) {
+  GPR_TIMER_SCOPE("grpc_completion_queue_destroy", 0);
   GRPC_API_TRACE("grpc_completion_queue_destroy(cq=%p)", 1, (cq));
-  GPR_TIMER_BEGIN("grpc_completion_queue_destroy", 0);
   grpc_completion_queue_shutdown(cq);
 
   grpc_core::ExecCtx exec_ctx;
   GRPC_CQ_INTERNAL_UNREF(cq, "destroy");
-
-  GPR_TIMER_END("grpc_completion_queue_destroy", 0);
 }
 
 grpc_pollset* grpc_cq_pollset(grpc_completion_queue* cq) {
diff --git a/src/core/lib/surface/init.cc b/src/core/lib/surface/init.cc
index 70329b09f4..7f7947faaa 100644
--- a/src/core/lib/surface/init.cc
+++ b/src/core/lib/surface/init.cc
@@ -42,7 +42,6 @@
 #include "src/core/lib/iomgr/timer_manager.h"
 #include "src/core/lib/profiling/timers.h"
 #include "src/core/lib/slice/slice_internal.h"
-#include "src/core/lib/surface/alarm_internal.h"
 #include "src/core/lib/surface/api_trace.h"
 #include "src/core/lib/surface/call.h"
 #include "src/core/lib/surface/channel_init.h"
@@ -162,9 +161,9 @@ void grpc_shutdown(void) {
     {
       grpc_core::ExecCtx exec_ctx(0);
       {
-        grpc_executor_shutdown();
         grpc_timer_manager_set_threading(
             false);  // shutdown timer_manager thread
+        grpc_executor_shutdown();
         for (i = g_number_of_plugins; i >= 0; i--) {
           if (g_all_of_the_plugins[i].destroy != nullptr) {
             g_all_of_the_plugins[i].destroy();
diff --git a/src/core/lib/surface/version.cc b/src/core/lib/surface/version.cc
index 19498a6df7..51daad0368 100644
--- a/src/core/lib/surface/version.cc
+++ b/src/core/lib/surface/version.cc
@@ -21,6 +21,6 @@
 
 #include <grpc/grpc.h>
 
-const char* grpc_version_string(void) { return "5.0.0-dev"; }
+const char* grpc_version_string(void) { return "6.0.0-dev"; }
 
 const char* grpc_g_stands_for(void) { return "glamorous"; }
diff --git a/src/core/lib/transport/metadata.cc b/src/core/lib/transport/metadata.cc
index 652222bd0b..cc1edd586f 100644
--- a/src/core/lib/transport/metadata.cc
+++ b/src/core/lib/transport/metadata.cc
@@ -166,12 +166,13 @@ static void ref_md_locked(mdtab_shard* shard,
 }
 
 static void gc_mdtab(mdtab_shard* shard) {
+  GPR_TIMER_SCOPE("gc_mdtab", 0);
+
   size_t i;
   interned_metadata** prev_next;
   interned_metadata *md, *next;
   gpr_atm num_freed = 0;
 
-  GPR_TIMER_BEGIN("gc_mdtab", 0);
   for (i = 0; i < shard->capacity; i++) {
     prev_next = &shard->elems[i];
     for (md = shard->elems[i]; md; md = next) {
@@ -194,18 +195,17 @@ static void gc_mdtab(mdtab_shard* shard) {
     }
   }
   gpr_atm_no_barrier_fetch_add(&shard->free_estimate, -num_freed);
-  GPR_TIMER_END("gc_mdtab", 0);
 }
 
 static void grow_mdtab(mdtab_shard* shard) {
+  GPR_TIMER_SCOPE("grow_mdtab", 0);
+
   size_t capacity = shard->capacity * 2;
   size_t i;
   interned_metadata** mdtab;
   interned_metadata *md, *next;
   uint32_t hash;
 
-  GPR_TIMER_BEGIN("grow_mdtab", 0);
-
   mdtab =
       (interned_metadata**)gpr_zalloc(sizeof(interned_metadata*) * capacity);
 
@@ -220,12 +220,9 @@ static void grow_mdtab(mdtab_shard* shard) {
       mdtab[idx] = md;
     }
   }
-
   gpr_free(shard->elems);
   shard->elems = mdtab;
   shard->capacity = capacity;
-
-  GPR_TIMER_END("grow_mdtab", 0);
 }
 
 static void rehash_mdtab(mdtab_shard* shard) {
@@ -280,7 +277,7 @@ grpc_mdelem grpc_mdelem_create(
   mdtab_shard* shard = &g_shards[SHARD_IDX(hash)];
   size_t idx;
 
-  GPR_TIMER_BEGIN("grpc_mdelem_from_metadata_strings", 0);
+  GPR_TIMER_SCOPE("grpc_mdelem_from_metadata_strings", 0);
 
   gpr_mu_lock(&shard->mu);
 
@@ -290,7 +287,6 @@ grpc_mdelem grpc_mdelem_create(
     if (grpc_slice_eq(key, md->key) && grpc_slice_eq(value, md->value)) {
       REF_MD_LOCKED(shard, md);
       gpr_mu_unlock(&shard->mu);
-      GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0);
       return GRPC_MAKE_MDELEM(md, GRPC_MDELEM_STORAGE_INTERNED);
     }
   }
@@ -323,8 +319,6 @@ grpc_mdelem grpc_mdelem_create(
 
   gpr_mu_unlock(&shard->mu);
 
-  GPR_TIMER_END("grpc_mdelem_from_metadata_strings", 0);
-
   return GRPC_MAKE_MDELEM(md, GRPC_MDELEM_STORAGE_INTERNED);
 }
 
diff --git a/src/core/lib/transport/static_metadata.cc b/src/core/lib/transport/static_metadata.cc
index 82ba7ac51a..ebc75724cf 100644
--- a/src/core/lib/transport/static_metadata.cc
+++ b/src/core/lib/transport/static_metadata.cc
@@ -20,7 +20,7 @@
  * To make changes to this file, change
  * tools/codegen/core/gen_static_metadata.py, and then re-run it.
  *
- * See metadata.h for an explanation of the interface here, and metadata.c for
+ * See metadata.h for an explanation of the interface here, and metadata.cc for
  * an explanation of what's going on.
  */
 
@@ -57,53 +57,52 @@ static uint8_t g_bytes[] = {
     112, 111, 110, 115, 101, 95,  109, 101, 115, 115, 97,  103, 101, 95,  98,
     121, 116, 101, 115, 47,  103, 114, 112, 99,  46,  108, 98,  46,  118, 49,
     46,  76,  111, 97,  100, 66,  97,  108, 97,  110, 99,  101, 114, 47,  66,
-    97,  108, 97,  110, 99,  101, 76,  111, 97,  100, 109, 101, 115, 115, 97,
-    103, 101, 47,  100, 101, 102, 108, 97,  116, 101, 109, 101, 115, 115, 97,
-    103, 101, 47,  103, 122, 105, 112, 115, 116, 114, 101, 97,  109, 47,  103,
-    122, 105, 112, 48,  49,  50,  105, 100, 101, 110, 116, 105, 116, 121, 103,
-    122, 105, 112, 100, 101, 102, 108, 97,  116, 101, 116, 114, 97,  105, 108,
-    101, 114, 115, 97,  112, 112, 108, 105, 99,  97,  116, 105, 111, 110, 47,
-    103, 114, 112, 99,  80,  79,  83,  84,  50,  48,  48,  52,  48,  52,  104,
-    116, 116, 112, 104, 116, 116, 112, 115, 103, 114, 112, 99,  71,  69,  84,
-    80,  85,  84,  47,  47,  105, 110, 100, 101, 120, 46,  104, 116, 109, 108,
-    50,  48,  52,  50,  48,  54,  51,  48,  52,  52,  48,  48,  53,  48,  48,
-    97,  99,  99,  101, 112, 116, 45,  99,  104, 97,  114, 115, 101, 116, 103,
-    122, 105, 112, 44,  32,  100, 101, 102, 108, 97,  116, 101, 97,  99,  99,
-    101, 112, 116, 45,  108, 97,  110, 103, 117, 97,  103, 101, 97,  99,  99,
-    101, 112, 116, 45,  114, 97,  110, 103, 101, 115, 97,  99,  99,  101, 112,
-    116, 97,  99,  99,  101, 115, 115, 45,  99,  111, 110, 116, 114, 111, 108,
-    45,  97,  108, 108, 111, 119, 45,  111, 114, 105, 103, 105, 110, 97,  103,
-    101, 97,  108, 108, 111, 119, 97,  117, 116, 104, 111, 114, 105, 122, 97,
-    116, 105, 111, 110, 99,  97,  99,  104, 101, 45,  99,  111, 110, 116, 114,
-    111, 108, 99,  111, 110, 116, 101, 110, 116, 45,  100, 105, 115, 112, 111,
-    115, 105, 116, 105, 111, 110, 99,  111, 110, 116, 101, 110, 116, 45,  108,
-    97,  110, 103, 117, 97,  103, 101, 99,  111, 110, 116, 101, 110, 116, 45,
-    108, 101, 110, 103, 116, 104, 99,  111, 110, 116, 101, 110, 116, 45,  108,
-    111, 99,  97,  116, 105, 111, 110, 99,  111, 110, 116, 101, 110, 116, 45,
-    114, 97,  110, 103, 101, 99,  111, 111, 107, 105, 101, 100, 97,  116, 101,
-    101, 116, 97,  103, 101, 120, 112, 101, 99,  116, 101, 120, 112, 105, 114,
-    101, 115, 102, 114, 111, 109, 105, 102, 45,  109, 97,  116, 99,  104, 105,
-    102, 45,  109, 111, 100, 105, 102, 105, 101, 100, 45,  115, 105, 110, 99,
-    101, 105, 102, 45,  110, 111, 110, 101, 45,  109, 97,  116, 99,  104, 105,
-    102, 45,  114, 97,  110, 103, 101, 105, 102, 45,  117, 110, 109, 111, 100,
-    105, 102, 105, 101, 100, 45,  115, 105, 110, 99,  101, 108, 97,  115, 116,
-    45,  109, 111, 100, 105, 102, 105, 101, 100, 108, 98,  45,  99,  111, 115,
-    116, 45,  98,  105, 110, 108, 105, 110, 107, 108, 111, 99,  97,  116, 105,
-    111, 110, 109, 97,  120, 45,  102, 111, 114, 119, 97,  114, 100, 115, 112,
-    114, 111, 120, 121, 45,  97,  117, 116, 104, 101, 110, 116, 105, 99,  97,
-    116, 101, 112, 114, 111, 120, 121, 45,  97,  117, 116, 104, 111, 114, 105,
-    122, 97,  116, 105, 111, 110, 114, 97,  110, 103, 101, 114, 101, 102, 101,
-    114, 101, 114, 114, 101, 102, 114, 101, 115, 104, 114, 101, 116, 114, 121,
-    45,  97,  102, 116, 101, 114, 115, 101, 114, 118, 101, 114, 115, 101, 116,
-    45,  99,  111, 111, 107, 105, 101, 115, 116, 114, 105, 99,  116, 45,  116,
-    114, 97,  110, 115, 112, 111, 114, 116, 45,  115, 101, 99,  117, 114, 105,
-    116, 121, 116, 114, 97,  110, 115, 102, 101, 114, 45,  101, 110, 99,  111,
-    100, 105, 110, 103, 118, 97,  114, 121, 118, 105, 97,  119, 119, 119, 45,
-    97,  117, 116, 104, 101, 110, 116, 105, 99,  97,  116, 101, 105, 100, 101,
-    110, 116, 105, 116, 121, 44,  100, 101, 102, 108, 97,  116, 101, 105, 100,
-    101, 110, 116, 105, 116, 121, 44,  103, 122, 105, 112, 100, 101, 102, 108,
-    97,  116, 101, 44,  103, 122, 105, 112, 105, 100, 101, 110, 116, 105, 116,
-    121, 44,  100, 101, 102, 108, 97,  116, 101, 44,  103, 122, 105, 112};
+    97,  108, 97,  110, 99,  101, 76,  111, 97,  100, 100, 101, 102, 108, 97,
+    116, 101, 103, 122, 105, 112, 115, 116, 114, 101, 97,  109, 47,  103, 122,
+    105, 112, 48,  49,  50,  105, 100, 101, 110, 116, 105, 116, 121, 116, 114,
+    97,  105, 108, 101, 114, 115, 97,  112, 112, 108, 105, 99,  97,  116, 105,
+    111, 110, 47,  103, 114, 112, 99,  80,  79,  83,  84,  50,  48,  48,  52,
+    48,  52,  104, 116, 116, 112, 104, 116, 116, 112, 115, 103, 114, 112, 99,
+    71,  69,  84,  80,  85,  84,  47,  47,  105, 110, 100, 101, 120, 46,  104,
+    116, 109, 108, 50,  48,  52,  50,  48,  54,  51,  48,  52,  52,  48,  48,
+    53,  48,  48,  97,  99,  99,  101, 112, 116, 45,  99,  104, 97,  114, 115,
+    101, 116, 103, 122, 105, 112, 44,  32,  100, 101, 102, 108, 97,  116, 101,
+    97,  99,  99,  101, 112, 116, 45,  108, 97,  110, 103, 117, 97,  103, 101,
+    97,  99,  99,  101, 112, 116, 45,  114, 97,  110, 103, 101, 115, 97,  99,
+    99,  101, 112, 116, 97,  99,  99,  101, 115, 115, 45,  99,  111, 110, 116,
+    114, 111, 108, 45,  97,  108, 108, 111, 119, 45,  111, 114, 105, 103, 105,
+    110, 97,  103, 101, 97,  108, 108, 111, 119, 97,  117, 116, 104, 111, 114,
+    105, 122, 97,  116, 105, 111, 110, 99,  97,  99,  104, 101, 45,  99,  111,
+    110, 116, 114, 111, 108, 99,  111, 110, 116, 101, 110, 116, 45,  100, 105,
+    115, 112, 111, 115, 105, 116, 105, 111, 110, 99,  111, 110, 116, 101, 110,
+    116, 45,  108, 97,  110, 103, 117, 97,  103, 101, 99,  111, 110, 116, 101,
+    110, 116, 45,  108, 101, 110, 103, 116, 104, 99,  111, 110, 116, 101, 110,
+    116, 45,  108, 111, 99,  97,  116, 105, 111, 110, 99,  111, 110, 116, 101,
+    110, 116, 45,  114, 97,  110, 103, 101, 99,  111, 111, 107, 105, 101, 100,
+    97,  116, 101, 101, 116, 97,  103, 101, 120, 112, 101, 99,  116, 101, 120,
+    112, 105, 114, 101, 115, 102, 114, 111, 109, 105, 102, 45,  109, 97,  116,
+    99,  104, 105, 102, 45,  109, 111, 100, 105, 102, 105, 101, 100, 45,  115,
+    105, 110, 99,  101, 105, 102, 45,  110, 111, 110, 101, 45,  109, 97,  116,
+    99,  104, 105, 102, 45,  114, 97,  110, 103, 101, 105, 102, 45,  117, 110,
+    109, 111, 100, 105, 102, 105, 101, 100, 45,  115, 105, 110, 99,  101, 108,
+    97,  115, 116, 45,  109, 111, 100, 105, 102, 105, 101, 100, 108, 98,  45,
+    99,  111, 115, 116, 45,  98,  105, 110, 108, 105, 110, 107, 108, 111, 99,
+    97,  116, 105, 111, 110, 109, 97,  120, 45,  102, 111, 114, 119, 97,  114,
+    100, 115, 112, 114, 111, 120, 121, 45,  97,  117, 116, 104, 101, 110, 116,
+    105, 99,  97,  116, 101, 112, 114, 111, 120, 121, 45,  97,  117, 116, 104,
+    111, 114, 105, 122, 97,  116, 105, 111, 110, 114, 97,  110, 103, 101, 114,
+    101, 102, 101, 114, 101, 114, 114, 101, 102, 114, 101, 115, 104, 114, 101,
+    116, 114, 121, 45,  97,  102, 116, 101, 114, 115, 101, 114, 118, 101, 114,
+    115, 101, 116, 45,  99,  111, 111, 107, 105, 101, 115, 116, 114, 105, 99,
+    116, 45,  116, 114, 97,  110, 115, 112, 111, 114, 116, 45,  115, 101, 99,
+    117, 114, 105, 116, 121, 116, 114, 97,  110, 115, 102, 101, 114, 45,  101,
+    110, 99,  111, 100, 105, 110, 103, 118, 97,  114, 121, 118, 105, 97,  119,
+    119, 119, 45,  97,  117, 116, 104, 101, 110, 116, 105, 99,  97,  116, 101,
+    105, 100, 101, 110, 116, 105, 116, 121, 44,  100, 101, 102, 108, 97,  116,
+    101, 105, 100, 101, 110, 116, 105, 116, 121, 44,  103, 122, 105, 112, 100,
+    101, 102, 108, 97,  116, 101, 44,  103, 122, 105, 112, 105, 100, 101, 110,
+    116, 105, 116, 121, 44,  100, 101, 102, 108, 97,  116, 101, 44,  103, 122,
+    105, 112};
 
 static void static_ref(void* unused) {}
 static void static_unref(void* unused) {}
@@ -216,8 +215,6 @@ grpc_slice_refcount grpc_static_metadata_refcounts[GRPC_STATIC_MDSTR_COUNT] = {
     {&grpc_static_metadata_vtable, &static_sub_refcnt},
     {&grpc_static_metadata_vtable, &static_sub_refcnt},
     {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
-    {&grpc_static_metadata_vtable, &static_sub_refcnt},
 };
 
 const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT] = {
@@ -250,80 +247,78 @@ const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT] = {
     {&grpc_static_metadata_refcounts[26], {{g_bytes + 333, 30}}},
     {&grpc_static_metadata_refcounts[27], {{g_bytes + 363, 31}}},
     {&grpc_static_metadata_refcounts[28], {{g_bytes + 394, 36}}},
-    {&grpc_static_metadata_refcounts[29], {{g_bytes + 430, 15}}},
-    {&grpc_static_metadata_refcounts[30], {{g_bytes + 445, 12}}},
-    {&grpc_static_metadata_refcounts[31], {{g_bytes + 457, 11}}},
-    {&grpc_static_metadata_refcounts[32], {{g_bytes + 468, 1}}},
-    {&grpc_static_metadata_refcounts[33], {{g_bytes + 469, 1}}},
-    {&grpc_static_metadata_refcounts[34], {{g_bytes + 470, 1}}},
-    {&grpc_static_metadata_refcounts[35], {{g_bytes + 471, 8}}},
-    {&grpc_static_metadata_refcounts[36], {{g_bytes + 479, 4}}},
-    {&grpc_static_metadata_refcounts[37], {{g_bytes + 483, 7}}},
-    {&grpc_static_metadata_refcounts[38], {{g_bytes + 490, 8}}},
-    {&grpc_static_metadata_refcounts[39], {{g_bytes + 498, 16}}},
-    {&grpc_static_metadata_refcounts[40], {{g_bytes + 514, 4}}},
-    {&grpc_static_metadata_refcounts[41], {{g_bytes + 518, 3}}},
-    {&grpc_static_metadata_refcounts[42], {{g_bytes + 521, 3}}},
-    {&grpc_static_metadata_refcounts[43], {{g_bytes + 524, 4}}},
-    {&grpc_static_metadata_refcounts[44], {{g_bytes + 528, 5}}},
-    {&grpc_static_metadata_refcounts[45], {{g_bytes + 533, 4}}},
-    {&grpc_static_metadata_refcounts[46], {{g_bytes + 537, 3}}},
-    {&grpc_static_metadata_refcounts[47], {{g_bytes + 540, 3}}},
-    {&grpc_static_metadata_refcounts[48], {{g_bytes + 543, 1}}},
-    {&grpc_static_metadata_refcounts[49], {{g_bytes + 544, 11}}},
-    {&grpc_static_metadata_refcounts[50], {{g_bytes + 555, 3}}},
-    {&grpc_static_metadata_refcounts[51], {{g_bytes + 558, 3}}},
-    {&grpc_static_metadata_refcounts[52], {{g_bytes + 561, 3}}},
-    {&grpc_static_metadata_refcounts[53], {{g_bytes + 564, 3}}},
-    {&grpc_static_metadata_refcounts[54], {{g_bytes + 567, 3}}},
-    {&grpc_static_metadata_refcounts[55], {{g_bytes + 570, 14}}},
-    {&grpc_static_metadata_refcounts[56], {{g_bytes + 584, 13}}},
-    {&grpc_static_metadata_refcounts[57], {{g_bytes + 597, 15}}},
-    {&grpc_static_metadata_refcounts[58], {{g_bytes + 612, 13}}},
-    {&grpc_static_metadata_refcounts[59], {{g_bytes + 625, 6}}},
-    {&grpc_static_metadata_refcounts[60], {{g_bytes + 631, 27}}},
-    {&grpc_static_metadata_refcounts[61], {{g_bytes + 658, 3}}},
-    {&grpc_static_metadata_refcounts[62], {{g_bytes + 661, 5}}},
-    {&grpc_static_metadata_refcounts[63], {{g_bytes + 666, 13}}},
-    {&grpc_static_metadata_refcounts[64], {{g_bytes + 679, 13}}},
-    {&grpc_static_metadata_refcounts[65], {{g_bytes + 692, 19}}},
-    {&grpc_static_metadata_refcounts[66], {{g_bytes + 711, 16}}},
-    {&grpc_static_metadata_refcounts[67], {{g_bytes + 727, 14}}},
-    {&grpc_static_metadata_refcounts[68], {{g_bytes + 741, 16}}},
-    {&grpc_static_metadata_refcounts[69], {{g_bytes + 757, 13}}},
-    {&grpc_static_metadata_refcounts[70], {{g_bytes + 770, 6}}},
-    {&grpc_static_metadata_refcounts[71], {{g_bytes + 776, 4}}},
-    {&grpc_static_metadata_refcounts[72], {{g_bytes + 780, 4}}},
-    {&grpc_static_metadata_refcounts[73], {{g_bytes + 784, 6}}},
-    {&grpc_static_metadata_refcounts[74], {{g_bytes + 790, 7}}},
-    {&grpc_static_metadata_refcounts[75], {{g_bytes + 797, 4}}},
-    {&grpc_static_metadata_refcounts[76], {{g_bytes + 801, 8}}},
-    {&grpc_static_metadata_refcounts[77], {{g_bytes + 809, 17}}},
-    {&grpc_static_metadata_refcounts[78], {{g_bytes + 826, 13}}},
-    {&grpc_static_metadata_refcounts[79], {{g_bytes + 839, 8}}},
-    {&grpc_static_metadata_refcounts[80], {{g_bytes + 847, 19}}},
-    {&grpc_static_metadata_refcounts[81], {{g_bytes + 866, 13}}},
-    {&grpc_static_metadata_refcounts[82], {{g_bytes + 879, 11}}},
-    {&grpc_static_metadata_refcounts[83], {{g_bytes + 890, 4}}},
-    {&grpc_static_metadata_refcounts[84], {{g_bytes + 894, 8}}},
-    {&grpc_static_metadata_refcounts[85], {{g_bytes + 902, 12}}},
-    {&grpc_static_metadata_refcounts[86], {{g_bytes + 914, 18}}},
-    {&grpc_static_metadata_refcounts[87], {{g_bytes + 932, 19}}},
-    {&grpc_static_metadata_refcounts[88], {{g_bytes + 951, 5}}},
-    {&grpc_static_metadata_refcounts[89], {{g_bytes + 956, 7}}},
-    {&grpc_static_metadata_refcounts[90], {{g_bytes + 963, 7}}},
-    {&grpc_static_metadata_refcounts[91], {{g_bytes + 970, 11}}},
-    {&grpc_static_metadata_refcounts[92], {{g_bytes + 981, 6}}},
-    {&grpc_static_metadata_refcounts[93], {{g_bytes + 987, 10}}},
-    {&grpc_static_metadata_refcounts[94], {{g_bytes + 997, 25}}},
-    {&grpc_static_metadata_refcounts[95], {{g_bytes + 1022, 17}}},
-    {&grpc_static_metadata_refcounts[96], {{g_bytes + 1039, 4}}},
-    {&grpc_static_metadata_refcounts[97], {{g_bytes + 1043, 3}}},
-    {&grpc_static_metadata_refcounts[98], {{g_bytes + 1046, 16}}},
-    {&grpc_static_metadata_refcounts[99], {{g_bytes + 1062, 16}}},
-    {&grpc_static_metadata_refcounts[100], {{g_bytes + 1078, 13}}},
-    {&grpc_static_metadata_refcounts[101], {{g_bytes + 1091, 12}}},
-    {&grpc_static_metadata_refcounts[102], {{g_bytes + 1103, 21}}},
+    {&grpc_static_metadata_refcounts[29], {{g_bytes + 430, 7}}},
+    {&grpc_static_metadata_refcounts[30], {{g_bytes + 437, 4}}},
+    {&grpc_static_metadata_refcounts[31], {{g_bytes + 441, 11}}},
+    {&grpc_static_metadata_refcounts[32], {{g_bytes + 452, 1}}},
+    {&grpc_static_metadata_refcounts[33], {{g_bytes + 453, 1}}},
+    {&grpc_static_metadata_refcounts[34], {{g_bytes + 454, 1}}},
+    {&grpc_static_metadata_refcounts[35], {{g_bytes + 455, 8}}},
+    {&grpc_static_metadata_refcounts[36], {{g_bytes + 463, 8}}},
+    {&grpc_static_metadata_refcounts[37], {{g_bytes + 471, 16}}},
+    {&grpc_static_metadata_refcounts[38], {{g_bytes + 487, 4}}},
+    {&grpc_static_metadata_refcounts[39], {{g_bytes + 491, 3}}},
+    {&grpc_static_metadata_refcounts[40], {{g_bytes + 494, 3}}},
+    {&grpc_static_metadata_refcounts[41], {{g_bytes + 497, 4}}},
+    {&grpc_static_metadata_refcounts[42], {{g_bytes + 501, 5}}},
+    {&grpc_static_metadata_refcounts[43], {{g_bytes + 506, 4}}},
+    {&grpc_static_metadata_refcounts[44], {{g_bytes + 510, 3}}},
+    {&grpc_static_metadata_refcounts[45], {{g_bytes + 513, 3}}},
+    {&grpc_static_metadata_refcounts[46], {{g_bytes + 516, 1}}},
+    {&grpc_static_metadata_refcounts[47], {{g_bytes + 517, 11}}},
+    {&grpc_static_metadata_refcounts[48], {{g_bytes + 528, 3}}},
+    {&grpc_static_metadata_refcounts[49], {{g_bytes + 531, 3}}},
+    {&grpc_static_metadata_refcounts[50], {{g_bytes + 534, 3}}},
+    {&grpc_static_metadata_refcounts[51], {{g_bytes + 537, 3}}},
+    {&grpc_static_metadata_refcounts[52], {{g_bytes + 540, 3}}},
+    {&grpc_static_metadata_refcounts[53], {{g_bytes + 543, 14}}},
+    {&grpc_static_metadata_refcounts[54], {{g_bytes + 557, 13}}},
+    {&grpc_static_metadata_refcounts[55], {{g_bytes + 570, 15}}},
+    {&grpc_static_metadata_refcounts[56], {{g_bytes + 585, 13}}},
+    {&grpc_static_metadata_refcounts[57], {{g_bytes + 598, 6}}},
+    {&grpc_static_metadata_refcounts[58], {{g_bytes + 604, 27}}},
+    {&grpc_static_metadata_refcounts[59], {{g_bytes + 631, 3}}},
+    {&grpc_static_metadata_refcounts[60], {{g_bytes + 634, 5}}},
+    {&grpc_static_metadata_refcounts[61], {{g_bytes + 639, 13}}},
+    {&grpc_static_metadata_refcounts[62], {{g_bytes + 652, 13}}},
+    {&grpc_static_metadata_refcounts[63], {{g_bytes + 665, 19}}},
+    {&grpc_static_metadata_refcounts[64], {{g_bytes + 684, 16}}},
+    {&grpc_static_metadata_refcounts[65], {{g_bytes + 700, 14}}},
+    {&grpc_static_metadata_refcounts[66], {{g_bytes + 714, 16}}},
+    {&grpc_static_metadata_refcounts[67], {{g_bytes + 730, 13}}},
+    {&grpc_static_metadata_refcounts[68], {{g_bytes + 743, 6}}},
+    {&grpc_static_metadata_refcounts[69], {{g_bytes + 749, 4}}},
+    {&grpc_static_metadata_refcounts[70], {{g_bytes + 753, 4}}},
+    {&grpc_static_metadata_refcounts[71], {{g_bytes + 757, 6}}},
+    {&grpc_static_metadata_refcounts[72], {{g_bytes + 763, 7}}},
+    {&grpc_static_metadata_refcounts[73], {{g_bytes + 770, 4}}},
+    {&grpc_static_metadata_refcounts[74], {{g_bytes + 774, 8}}},
+    {&grpc_static_metadata_refcounts[75], {{g_bytes + 782, 17}}},
+    {&grpc_static_metadata_refcounts[76], {{g_bytes + 799, 13}}},
+    {&grpc_static_metadata_refcounts[77], {{g_bytes + 812, 8}}},
+    {&grpc_static_metadata_refcounts[78], {{g_bytes + 820, 19}}},
+    {&grpc_static_metadata_refcounts[79], {{g_bytes + 839, 13}}},
+    {&grpc_static_metadata_refcounts[80], {{g_bytes + 852, 11}}},
+    {&grpc_static_metadata_refcounts[81], {{g_bytes + 863, 4}}},
+    {&grpc_static_metadata_refcounts[82], {{g_bytes + 867, 8}}},
+    {&grpc_static_metadata_refcounts[83], {{g_bytes + 875, 12}}},
+    {&grpc_static_metadata_refcounts[84], {{g_bytes + 887, 18}}},
+    {&grpc_static_metadata_refcounts[85], {{g_bytes + 905, 19}}},
+    {&grpc_static_metadata_refcounts[86], {{g_bytes + 924, 5}}},
+    {&grpc_static_metadata_refcounts[87], {{g_bytes + 929, 7}}},
+    {&grpc_static_metadata_refcounts[88], {{g_bytes + 936, 7}}},
+    {&grpc_static_metadata_refcounts[89], {{g_bytes + 943, 11}}},
+    {&grpc_static_metadata_refcounts[90], {{g_bytes + 954, 6}}},
+    {&grpc_static_metadata_refcounts[91], {{g_bytes + 960, 10}}},
+    {&grpc_static_metadata_refcounts[92], {{g_bytes + 970, 25}}},
+    {&grpc_static_metadata_refcounts[93], {{g_bytes + 995, 17}}},
+    {&grpc_static_metadata_refcounts[94], {{g_bytes + 1012, 4}}},
+    {&grpc_static_metadata_refcounts[95], {{g_bytes + 1016, 3}}},
+    {&grpc_static_metadata_refcounts[96], {{g_bytes + 1019, 16}}},
+    {&grpc_static_metadata_refcounts[97], {{g_bytes + 1035, 16}}},
+    {&grpc_static_metadata_refcounts[98], {{g_bytes + 1051, 13}}},
+    {&grpc_static_metadata_refcounts[99], {{g_bytes + 1064, 12}}},
+    {&grpc_static_metadata_refcounts[100], {{g_bytes + 1076, 21}}},
 };
 
 uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] = {
@@ -333,16 +328,16 @@ uintptr_t grpc_static_mdelem_user_data[GRPC_STATIC_MDELEM_COUNT] = {
     0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 4, 4, 6, 6, 8, 8, 2, 4, 4};
 
 static const int8_t elems_r[] = {
-    11, 9,  -3, 0,  10,  25, -77, 26,  0,   11,  -7,  0,   0,  0,  21, 14, 1,
-    0,  0,  33, 12, 11,  0,  0,   0,   0,   0,   0,   0,   0,  0,  0,  0,  0,
-    0,  0,  0,  0,  0,   0,  0,   0,   0,   0,   0,   0,   0,  0,  0,  0,  0,
-    0,  0,  0,  0,  -56, 0,  -36, -61, -60, -39, -63, -64, 0,  36, 35, 34, 33,
-    34, 33, 32, 31, 31,  30, 29,  28,  27,  26,  26,  25,  25, 24, 23, 22, 21,
-    20, 19, 22, 21, 20,  19, 18,  17,  16,  15,  14,  13,  12, 12, 11, 0};
+    13, 2,  1,   0,  15,  4,   0,   21,  0,   23,  -3, 0,  0,  0,  10, 19, -4,
+    0,  0,  1,   10, 9,   0,   0,   0,   0,   0,   0,  0,  0,  0,  0,  0,  0,
+    0,  0,  0,   0,  0,   0,   0,   0,   0,   0,   0,  0,  0,  0,  0,  0,  0,
+    0,  0,  -52, 0,  -55, -36, -57, -58, -58, -58, 0,  40, 39, 38, 37, 36, 35,
+    34, 33, 32,  31, 30,  29,  28,  28,  27,  26,  25, 24, 23, 22, 21, 20, 19,
+    18, 17, 16,  15, 18,  17,  16,  15,  14,  13,  12, 11, 11, 0};
 static uint32_t elems_phash(uint32_t i) {
-  i -= 48;
-  uint32_t x = i % 101;
-  uint32_t y = i / 101;
+  i -= 46;
+  uint32_t x = i % 99;
+  uint32_t y = i / 99;
   uint32_t h = x;
   if (y < GPR_ARRAY_SIZE(elems_r)) {
     uint32_t delta = (uint32_t)elems_r[y];
@@ -352,31 +347,31 @@ static uint32_t elems_phash(uint32_t i) {
 }
 
 static const uint16_t elem_keys[] = {
-    1065, 1066, 1067, 256,  257,  258,  259,  260,  1671,  149,   150,  48,
-    49,   455,  456,  457,  962,  963,  964,  1568, 1683,  1684,  753,  754,
-    1465, 553,  755,  2083, 2186, 5688, 5997, 1580, 1581,  6100,  6306, 6409,
-    6512, 6615, 6718, 6821, 1481, 1704, 6924, 7027, 7130,  7233,  1980, 7336,
-    7439, 7542, 7645, 7748, 7851, 5894, 7954, 8057, 6203,  8160,  8263, 8366,
-    8469, 8572, 8675, 8778, 1129, 1130, 1131, 1132, 8881,  8984,  9087, 9190,
-    9293, 9396, 9499, 9602, 9705, 9808, 9911, 332,  10014, 10117, 0,    0,
-    0,    1748, 0,    0,    0,    0,    0,    0,    0,     0,     0,    0,
-    0,    0,    0,    0,    0,    0,    0,    0,    0,     0,     143,  247,
-    248,  0,    0,    0,    0,    0,    0,    0,    0,     0,     0,    0,
-    0,    0,    0,    0,    0,    0,    0,    0,    0,     0,     0,    0,
-    0,    0,    0,    0};
+    1039, 1040, 145,  146,  541,  1639, 1045, 250,  251,  252,  253,  254,
+    1646, 46,   47,   1437, 1942, 1651, 445,  446,  447,  739,  740,  741,
+    938,  939,  1538, 2043, 2144, 1451, 944,  5376, 5578, 1545, 5780, 5881,
+    1670, 5982, 1550, 6083, 6184, 6285, 6386, 6487, 6588, 6689, 6790, 6891,
+    6992, 7093, 7194, 7295, 7396, 5679, 7497, 7598, 7699, 7800, 7901, 8002,
+    8103, 8204, 8305, 8406, 8507, 8608, 8709, 8810, 1107, 1108, 1109, 1110,
+    8911, 9012, 9113, 9214, 9315, 9416, 9517, 9618, 1714, 9719, 0,    326,
+    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+    0,    0,    241,  242,  0,    0,    0,    0,    0,    0,    139,  0,
+    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,    0,
+    0,    0,    0,    0,    0,    0};
 static const uint8_t elem_idxs[] = {
-    76,  79,  77,  19,  20,  21,  22,  23,  25,  15,  16,  17,  18,  11,
-    12,  13,  3,   4,   5,   38,  83,  84,  0,   1,   43,  6,   2,   50,
-    57,  24,  28,  36,  37,  29,  31,  32,  33,  34,  35,  39,  7,   26,
-    40,  41,  42,  44,  72,  45,  46,  47,  48,  49,  51,  27,  52,  53,
-    30,  54,  55,  56,  58,  59,  60,  61,  78,  80,  81,  82,  62,  63,
-    64,  65,  66,  67,  68,  69,  70,  71,  73,  14,  74,  75,  255, 255,
-    255, 85,  255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
-    255, 255, 255, 255, 255, 255, 255, 255, 8,   9,   10};
+    77,  79,  15,  16,  6,   25,  76,  19,  20,  21,  22,  23,  84,  17,
+    18,  43,  72,  83,  11,  12,  13,  0,   1,   2,   5,   4,   38,  50,
+    57,  7,   3,   24,  27,  37,  29,  30,  26,  31,  36,  32,  33,  34,
+    35,  39,  40,  41,  42,  44,  45,  46,  47,  48,  49,  28,  51,  52,
+    53,  54,  55,  56,  58,  59,  60,  61,  62,  63,  64,  65,  78,  80,
+    81,  82,  66,  67,  68,  69,  70,  71,  73,  74,  85,  75,  255, 14,
+    255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
+    9,   10,  255, 255, 255, 255, 255, 255, 8};
 
 grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {
   if (a == -1 || b == -1) return GRPC_MDNULL;
-  uint32_t k = (uint32_t)(a * 103 + b);
+  uint32_t k = (uint32_t)(a * 101 + b);
   uint32_t h = elems_phash(k);
   return h < GPR_ARRAY_SIZE(elem_keys) && elem_keys[h] == k &&
                  elem_idxs[h] != 255
@@ -387,177 +382,177 @@ grpc_mdelem grpc_static_mdelem_for_static_strings(int a, int b) {
 
 grpc_mdelem_data grpc_static_mdelem_table[GRPC_STATIC_MDELEM_COUNT] = {
     {{&grpc_static_metadata_refcounts[7], {{g_bytes + 50, 11}}},
-     {&grpc_static_metadata_refcounts[32], {{g_bytes + 468, 1}}}},
+     {&grpc_static_metadata_refcounts[32], {{g_bytes + 452, 1}}}},
     {{&grpc_static_metadata_refcounts[7], {{g_bytes + 50, 11}}},
-     {&grpc_static_metadata_refcounts[33], {{g_bytes + 469, 1}}}},
+     {&grpc_static_metadata_refcounts[33], {{g_bytes + 453, 1}}}},
     {{&grpc_static_metadata_refcounts[7], {{g_bytes + 50, 11}}},
-     {&grpc_static_metadata_refcounts[34], {{g_bytes + 470, 1}}}},
+     {&grpc_static_metadata_refcounts[34], {{g_bytes + 454, 1}}}},
     {{&grpc_static_metadata_refcounts[9], {{g_bytes + 77, 13}}},
-     {&grpc_static_metadata_refcounts[35], {{g_bytes + 471, 8}}}},
+     {&grpc_static_metadata_refcounts[35], {{g_bytes + 455, 8}}}},
     {{&grpc_static_metadata_refcounts[9], {{g_bytes + 77, 13}}},
-     {&grpc_static_metadata_refcounts[36], {{g_bytes + 479, 4}}}},
+     {&grpc_static_metadata_refcounts[30], {{g_bytes + 437, 4}}}},
     {{&grpc_static_metadata_refcounts[9], {{g_bytes + 77, 13}}},
-     {&grpc_static_metadata_refcounts[37], {{g_bytes + 483, 7}}}},
+     {&grpc_static_metadata_refcounts[29], {{g_bytes + 430, 7}}}},
     {{&grpc_static_metadata_refcounts[5], {{g_bytes + 36, 2}}},
-     {&grpc_static_metadata_refcounts[38], {{g_bytes + 490, 8}}}},
+     {&grpc_static_metadata_refcounts[36], {{g_bytes + 463, 8}}}},
     {{&grpc_static_metadata_refcounts[14], {{g_bytes + 158, 12}}},
-     {&grpc_static_metadata_refcounts[39], {{g_bytes + 498, 16}}}},
+     {&grpc_static_metadata_refcounts[37], {{g_bytes + 471, 16}}}},
     {{&grpc_static_metadata_refcounts[1], {{g_bytes + 5, 7}}},
-     {&grpc_static_metadata_refcounts[40], {{g_bytes + 514, 4}}}},
+     {&grpc_static_metadata_refcounts[38], {{g_bytes + 487, 4}}}},
     {{&grpc_static_metadata_refcounts[2], {{g_bytes + 12, 7}}},
-     {&grpc_static_metadata_refcounts[41], {{g_bytes + 518, 3}}}},
+     {&grpc_static_metadata_refcounts[39], {{g_bytes + 491, 3}}}},
     {{&grpc_static_metadata_refcounts[2], {{g_bytes + 12, 7}}},
-     {&grpc_static_metadata_refcounts[42], {{g_bytes + 521, 3}}}},
+     {&grpc_static_metadata_refcounts[40], {{g_bytes + 494, 3}}}},
     {{&grpc_static_metadata_refcounts[4], {{g_bytes + 29, 7}}},
-     {&grpc_static_metadata_refcounts[43], {{g_bytes + 524, 4}}}},
+     {&grpc_static_metadata_refcounts[41], {{g_bytes + 497, 4}}}},
     {{&grpc_static_metadata_refcounts[4], {{g_bytes + 29, 7}}},
-     {&grpc_static_metadata_refcounts[44], {{g_bytes + 528, 5}}}},
+     {&grpc_static_metadata_refcounts[42], {{g_bytes + 501, 5}}}},
     {{&grpc_static_metadata_refcounts[4], {{g_bytes + 29, 7}}},
-     {&grpc_static_metadata_refcounts[45], {{g_bytes + 533, 4}}}},
+     {&grpc_static_metadata_refcounts[43], {{g_bytes + 506, 4}}}},
     {{&grpc_static_metadata_refcounts[3], {{g_bytes + 19, 10}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[1], {{g_bytes + 5, 7}}},
-     {&grpc_static_metadata_refcounts[46], {{g_bytes + 537, 3}}}},
+     {&grpc_static_metadata_refcounts[44], {{g_bytes + 510, 3}}}},
     {{&grpc_static_metadata_refcounts[1], {{g_bytes + 5, 7}}},
-     {&grpc_static_metadata_refcounts[47], {{g_bytes + 540, 3}}}},
+     {&grpc_static_metadata_refcounts[45], {{g_bytes + 513, 3}}}},
     {{&grpc_static_metadata_refcounts[0], {{g_bytes + 0, 5}}},
-     {&grpc_static_metadata_refcounts[48], {{g_bytes + 543, 1}}}},
+     {&grpc_static_metadata_refcounts[46], {{g_bytes + 516, 1}}}},
     {{&grpc_static_metadata_refcounts[0], {{g_bytes + 0, 5}}},
-     {&grpc_static_metadata_refcounts[49], {{g_bytes + 544, 11}}}},
+     {&grpc_static_metadata_refcounts[47], {{g_bytes + 517, 11}}}},
     {{&grpc_static_metadata_refcounts[2], {{g_bytes + 12, 7}}},
-     {&grpc_static_metadata_refcounts[50], {{g_bytes + 555, 3}}}},
+     {&grpc_static_metadata_refcounts[48], {{g_bytes + 528, 3}}}},
     {{&grpc_static_metadata_refcounts[2], {{g_bytes + 12, 7}}},
-     {&grpc_static_metadata_refcounts[51], {{g_bytes + 558, 3}}}},
+     {&grpc_static_metadata_refcounts[49], {{g_bytes + 531, 3}}}},
     {{&grpc_static_metadata_refcounts[2], {{g_bytes + 12, 7}}},
-     {&grpc_static_metadata_refcounts[52], {{g_bytes + 561, 3}}}},
+     {&grpc_static_metadata_refcounts[50], {{g_bytes + 534, 3}}}},
     {{&grpc_static_metadata_refcounts[2], {{g_bytes + 12, 7}}},
-     {&grpc_static_metadata_refcounts[53], {{g_bytes + 564, 3}}}},
+     {&grpc_static_metadata_refcounts[51], {{g_bytes + 537, 3}}}},
     {{&grpc_static_metadata_refcounts[2], {{g_bytes + 12, 7}}},
-     {&grpc_static_metadata_refcounts[54], {{g_bytes + 567, 3}}}},
-    {{&grpc_static_metadata_refcounts[55], {{g_bytes + 570, 14}}},
+     {&grpc_static_metadata_refcounts[52], {{g_bytes + 540, 3}}}},
+    {{&grpc_static_metadata_refcounts[53], {{g_bytes + 543, 14}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[16], {{g_bytes + 186, 15}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[16], {{g_bytes + 186, 15}}},
-     {&grpc_static_metadata_refcounts[56], {{g_bytes + 584, 13}}}},
-    {{&grpc_static_metadata_refcounts[57], {{g_bytes + 597, 15}}},
+     {&grpc_static_metadata_refcounts[54], {{g_bytes + 557, 13}}}},
+    {{&grpc_static_metadata_refcounts[55], {{g_bytes + 570, 15}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[58], {{g_bytes + 612, 13}}},
+    {{&grpc_static_metadata_refcounts[56], {{g_bytes + 585, 13}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[59], {{g_bytes + 625, 6}}},
+    {{&grpc_static_metadata_refcounts[57], {{g_bytes + 598, 6}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[60], {{g_bytes + 631, 27}}},
+    {{&grpc_static_metadata_refcounts[58], {{g_bytes + 604, 27}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[61], {{g_bytes + 658, 3}}},
+    {{&grpc_static_metadata_refcounts[59], {{g_bytes + 631, 3}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[62], {{g_bytes + 661, 5}}},
+    {{&grpc_static_metadata_refcounts[60], {{g_bytes + 634, 5}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[63], {{g_bytes + 666, 13}}},
+    {{&grpc_static_metadata_refcounts[61], {{g_bytes + 639, 13}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[64], {{g_bytes + 679, 13}}},
+    {{&grpc_static_metadata_refcounts[62], {{g_bytes + 652, 13}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[65], {{g_bytes + 692, 19}}},
+    {{&grpc_static_metadata_refcounts[63], {{g_bytes + 665, 19}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[15], {{g_bytes + 170, 16}}},
-     {&grpc_static_metadata_refcounts[35], {{g_bytes + 471, 8}}}},
+     {&grpc_static_metadata_refcounts[35], {{g_bytes + 455, 8}}}},
     {{&grpc_static_metadata_refcounts[15], {{g_bytes + 170, 16}}},
-     {&grpc_static_metadata_refcounts[36], {{g_bytes + 479, 4}}}},
+     {&grpc_static_metadata_refcounts[30], {{g_bytes + 437, 4}}}},
     {{&grpc_static_metadata_refcounts[15], {{g_bytes + 170, 16}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[66], {{g_bytes + 711, 16}}},
+    {{&grpc_static_metadata_refcounts[64], {{g_bytes + 684, 16}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[67], {{g_bytes + 727, 14}}},
+    {{&grpc_static_metadata_refcounts[65], {{g_bytes + 700, 14}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[68], {{g_bytes + 741, 16}}},
+    {{&grpc_static_metadata_refcounts[66], {{g_bytes + 714, 16}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[69], {{g_bytes + 757, 13}}},
+    {{&grpc_static_metadata_refcounts[67], {{g_bytes + 730, 13}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[14], {{g_bytes + 158, 12}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[70], {{g_bytes + 770, 6}}},
+    {{&grpc_static_metadata_refcounts[68], {{g_bytes + 743, 6}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[71], {{g_bytes + 776, 4}}},
+    {{&grpc_static_metadata_refcounts[69], {{g_bytes + 749, 4}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[72], {{g_bytes + 780, 4}}},
+    {{&grpc_static_metadata_refcounts[70], {{g_bytes + 753, 4}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[73], {{g_bytes + 784, 6}}},
+    {{&grpc_static_metadata_refcounts[71], {{g_bytes + 757, 6}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[74], {{g_bytes + 790, 7}}},
+    {{&grpc_static_metadata_refcounts[72], {{g_bytes + 763, 7}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[75], {{g_bytes + 797, 4}}},
+    {{&grpc_static_metadata_refcounts[73], {{g_bytes + 770, 4}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[20], {{g_bytes + 278, 4}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[76], {{g_bytes + 801, 8}}},
+    {{&grpc_static_metadata_refcounts[74], {{g_bytes + 774, 8}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[77], {{g_bytes + 809, 17}}},
+    {{&grpc_static_metadata_refcounts[75], {{g_bytes + 782, 17}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[78], {{g_bytes + 826, 13}}},
+    {{&grpc_static_metadata_refcounts[76], {{g_bytes + 799, 13}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[79], {{g_bytes + 839, 8}}},
+    {{&grpc_static_metadata_refcounts[77], {{g_bytes + 812, 8}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[80], {{g_bytes + 847, 19}}},
+    {{&grpc_static_metadata_refcounts[78], {{g_bytes + 820, 19}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[81], {{g_bytes + 866, 13}}},
+    {{&grpc_static_metadata_refcounts[79], {{g_bytes + 839, 13}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[21], {{g_bytes + 282, 8}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[82], {{g_bytes + 879, 11}}},
+    {{&grpc_static_metadata_refcounts[80], {{g_bytes + 852, 11}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[83], {{g_bytes + 890, 4}}},
+    {{&grpc_static_metadata_refcounts[81], {{g_bytes + 863, 4}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[84], {{g_bytes + 894, 8}}},
+    {{&grpc_static_metadata_refcounts[82], {{g_bytes + 867, 8}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[85], {{g_bytes + 902, 12}}},
+    {{&grpc_static_metadata_refcounts[83], {{g_bytes + 875, 12}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[86], {{g_bytes + 914, 18}}},
+    {{&grpc_static_metadata_refcounts[84], {{g_bytes + 887, 18}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[87], {{g_bytes + 932, 19}}},
+    {{&grpc_static_metadata_refcounts[85], {{g_bytes + 905, 19}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[88], {{g_bytes + 951, 5}}},
+    {{&grpc_static_metadata_refcounts[86], {{g_bytes + 924, 5}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[89], {{g_bytes + 956, 7}}},
+    {{&grpc_static_metadata_refcounts[87], {{g_bytes + 929, 7}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[90], {{g_bytes + 963, 7}}},
+    {{&grpc_static_metadata_refcounts[88], {{g_bytes + 936, 7}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[91], {{g_bytes + 970, 11}}},
+    {{&grpc_static_metadata_refcounts[89], {{g_bytes + 943, 11}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[92], {{g_bytes + 981, 6}}},
+    {{&grpc_static_metadata_refcounts[90], {{g_bytes + 954, 6}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[93], {{g_bytes + 987, 10}}},
+    {{&grpc_static_metadata_refcounts[91], {{g_bytes + 960, 10}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[94], {{g_bytes + 997, 25}}},
+    {{&grpc_static_metadata_refcounts[92], {{g_bytes + 970, 25}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[95], {{g_bytes + 1022, 17}}},
+    {{&grpc_static_metadata_refcounts[93], {{g_bytes + 995, 17}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[19], {{g_bytes + 268, 10}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[96], {{g_bytes + 1039, 4}}},
+    {{&grpc_static_metadata_refcounts[94], {{g_bytes + 1012, 4}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[97], {{g_bytes + 1043, 3}}},
+    {{&grpc_static_metadata_refcounts[95], {{g_bytes + 1016, 3}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
-    {{&grpc_static_metadata_refcounts[98], {{g_bytes + 1046, 16}}},
+    {{&grpc_static_metadata_refcounts[96], {{g_bytes + 1019, 16}}},
      {&grpc_static_metadata_refcounts[23], {{g_bytes + 302, 0}}}},
     {{&grpc_static_metadata_refcounts[10], {{g_bytes + 90, 20}}},
-     {&grpc_static_metadata_refcounts[35], {{g_bytes + 471, 8}}}},
+     {&grpc_static_metadata_refcounts[35], {{g_bytes + 455, 8}}}},
     {{&grpc_static_metadata_refcounts[10], {{g_bytes + 90, 20}}},
-     {&grpc_static_metadata_refcounts[37], {{g_bytes + 483, 7}}}},
+     {&grpc_static_metadata_refcounts[29], {{g_bytes + 430, 7}}}},
     {{&grpc_static_metadata_refcounts[10], {{g_bytes + 90, 20}}},
-     {&grpc_static_metadata_refcounts[99], {{g_bytes + 1062, 16}}}},
+     {&grpc_static_metadata_refcounts[97], {{g_bytes + 1035, 16}}}},
     {{&grpc_static_metadata_refcounts[10], {{g_bytes + 90, 20}}},
-     {&grpc_static_metadata_refcounts[36], {{g_bytes + 479, 4}}}},
+     {&grpc_static_metadata_refcounts[30], {{g_bytes + 437, 4}}}},
     {{&grpc_static_metadata_refcounts[10], {{g_bytes + 90, 20}}},
-     {&grpc_static_metadata_refcounts[100], {{g_bytes + 1078, 13}}}},
+     {&grpc_static_metadata_refcounts[98], {{g_bytes + 1051, 13}}}},
     {{&grpc_static_metadata_refcounts[10], {{g_bytes + 90, 20}}},
-     {&grpc_static_metadata_refcounts[101], {{g_bytes + 1091, 12}}}},
+     {&grpc_static_metadata_refcounts[99], {{g_bytes + 1064, 12}}}},
     {{&grpc_static_metadata_refcounts[10], {{g_bytes + 90, 20}}},
-     {&grpc_static_metadata_refcounts[102], {{g_bytes + 1103, 21}}}},
+     {&grpc_static_metadata_refcounts[100], {{g_bytes + 1076, 21}}}},
     {{&grpc_static_metadata_refcounts[16], {{g_bytes + 186, 15}}},
-     {&grpc_static_metadata_refcounts[35], {{g_bytes + 471, 8}}}},
+     {&grpc_static_metadata_refcounts[35], {{g_bytes + 455, 8}}}},
     {{&grpc_static_metadata_refcounts[16], {{g_bytes + 186, 15}}},
-     {&grpc_static_metadata_refcounts[36], {{g_bytes + 479, 4}}}},
+     {&grpc_static_metadata_refcounts[30], {{g_bytes + 437, 4}}}},
     {{&grpc_static_metadata_refcounts[16], {{g_bytes + 186, 15}}},
-     {&grpc_static_metadata_refcounts[100], {{g_bytes + 1078, 13}}}},
+     {&grpc_static_metadata_refcounts[98], {{g_bytes + 1051, 13}}}},
 };
 bool grpc_static_callout_is_default[GRPC_BATCH_CALLOUTS_COUNT] = {
     true,  // :path
diff --git a/src/core/lib/transport/static_metadata.h b/src/core/lib/transport/static_metadata.h
index 21dc7a3d3f..8ce9b21bc1 100644
--- a/src/core/lib/transport/static_metadata.h
+++ b/src/core/lib/transport/static_metadata.h
@@ -20,7 +20,7 @@
  * To make changes to this file, change
  * tools/codegen/core/gen_static_metadata.py, and then re-run it.
  *
- * See metadata.h for an explanation of the interface here, and metadata.c for
+ * See metadata.h for an explanation of the interface here, and metadata.cc for
  * an explanation of what's going on.
  */
 
@@ -29,7 +29,7 @@
 
 #include "src/core/lib/transport/metadata.h"
 
-#define GRPC_STATIC_MDSTR_COUNT 103
+#define GRPC_STATIC_MDSTR_COUNT 101
 extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 /* ":path" */
 #define GRPC_MDSTR_PATH (grpc_static_slice_table[0])
@@ -93,10 +93,10 @@ extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 /* "/grpc.lb.v1.LoadBalancer/BalanceLoad" */
 #define GRPC_MDSTR_SLASH_GRPC_DOT_LB_DOT_V1_DOT_LOADBALANCER_SLASH_BALANCELOAD \
   (grpc_static_slice_table[28])
-/* "message/deflate" */
-#define GRPC_MDSTR_MESSAGE_SLASH_DEFLATE (grpc_static_slice_table[29])
-/* "message/gzip" */
-#define GRPC_MDSTR_MESSAGE_SLASH_GZIP (grpc_static_slice_table[30])
+/* "deflate" */
+#define GRPC_MDSTR_DEFLATE (grpc_static_slice_table[29])
+/* "gzip" */
+#define GRPC_MDSTR_GZIP (grpc_static_slice_table[30])
 /* "stream/gzip" */
 #define GRPC_MDSTR_STREAM_SLASH_GZIP (grpc_static_slice_table[31])
 /* "0" */
@@ -107,141 +107,137 @@ extern const grpc_slice grpc_static_slice_table[GRPC_STATIC_MDSTR_COUNT];
 #define GRPC_MDSTR_2 (grpc_static_slice_table[34])
 /* "identity" */
 #define GRPC_MDSTR_IDENTITY (grpc_static_slice_table[35])
-/* "gzip" */
-#define GRPC_MDSTR_GZIP (grpc_static_slice_table[36])
-/* "deflate" */
-#define GRPC_MDSTR_DEFLATE (grpc_static_slice_table[37])
 /* "trailers" */
-#define GRPC_MDSTR_TRAILERS (grpc_static_slice_table[38])
+#define GRPC_MDSTR_TRAILERS (grpc_static_slice_table[36])
 /* "application/grpc" */
-#define GRPC_MDSTR_APPLICATION_SLASH_GRPC (grpc_static_slice_table[39])
+#define GRPC_MDSTR_APPLICATION_SLASH_GRPC (grpc_static_slice_table[37])
 /* "POST" */
-#define GRPC_MDSTR_POST (grpc_static_slice_table[40])
+#define GRPC_MDSTR_POST (grpc_static_slice_table[38])
 /* "200" */
-#define GRPC_MDSTR_200 (grpc_static_slice_table[41])
+#define GRPC_MDSTR_200 (grpc_static_slice_table[39])
 /* "404" */
-#define GRPC_MDSTR_404 (grpc_static_slice_table[42])
+#define GRPC_MDSTR_404 (grpc_static_slice_table[40])
 /* "http" */
-#define GRPC_MDSTR_HTTP (grpc_static_slice_table[43])
+#define GRPC_MDSTR_HTTP (grpc_static_slice_table[41])
 /* "https" */
-#define GRPC_MDSTR_HTTPS (grpc_static_slice_table[44])
+#define GRPC_MDSTR_HTTPS (grpc_static_slice_table[42])
 /* "grpc" */
-#define GRPC_MDSTR_GRPC (grpc_static_slice_table[45])
+#define GRPC_MDSTR_GRPC (grpc_static_slice_table[43])
 /* "GET" */
-#define GRPC_MDSTR_GET (grpc_static_slice_table[46])
+#define GRPC_MDSTR_GET (grpc_static_slice_table[44])
 /* "PUT" */
-#define GRPC_MDSTR_PUT (grpc_static_slice_table[47])
+#define GRPC_MDSTR_PUT (grpc_static_slice_table[45])
 /* "/" */
-#define GRPC_MDSTR_SLASH (grpc_static_slice_table[48])
+#define GRPC_MDSTR_SLASH (grpc_static_slice_table[46])
 /* "/index.html" */
-#define GRPC_MDSTR_SLASH_INDEX_DOT_HTML (grpc_static_slice_table[49])
+#define GRPC_MDSTR_SLASH_INDEX_DOT_HTML (grpc_static_slice_table[47])
 /* "204" */
-#define GRPC_MDSTR_204 (grpc_static_slice_table[50])
+#define GRPC_MDSTR_204 (grpc_static_slice_table[48])
 /* "206" */
-#define GRPC_MDSTR_206 (grpc_static_slice_table[51])
+#define GRPC_MDSTR_206 (grpc_static_slice_table[49])
 /* "304" */
-#define GRPC_MDSTR_304 (grpc_static_slice_table[52])
+#define GRPC_MDSTR_304 (grpc_static_slice_table[50])
 /* "400" */
-#define GRPC_MDSTR_400 (grpc_static_slice_table[53])
+#define GRPC_MDSTR_400 (grpc_static_slice_table[51])
 /* "500" */
-#define GRPC_MDSTR_500 (grpc_static_slice_table[54])
+#define GRPC_MDSTR_500 (grpc_static_slice_table[52])
 /* "accept-charset" */
-#define GRPC_MDSTR_ACCEPT_CHARSET (grpc_static_slice_table[55])
+#define GRPC_MDSTR_ACCEPT_CHARSET (grpc_static_slice_table[53])
 /* "gzip, deflate" */
-#define GRPC_MDSTR_GZIP_COMMA_DEFLATE (grpc_static_slice_table[56])
+#define GRPC_MDSTR_GZIP_COMMA_DEFLATE (grpc_static_slice_table[54])
 /* "accept-language" */
-#define GRPC_MDSTR_ACCEPT_LANGUAGE (grpc_static_slice_table[57])
+#define GRPC_MDSTR_ACCEPT_LANGUAGE (grpc_static_slice_table[55])
 /* "accept-ranges" */
-#define GRPC_MDSTR_ACCEPT_RANGES (grpc_static_slice_table[58])
+#define GRPC_MDSTR_ACCEPT_RANGES (grpc_static_slice_table[56])
 /* "accept" */
-#define GRPC_MDSTR_ACCEPT (grpc_static_slice_table[59])
+#define GRPC_MDSTR_ACCEPT (grpc_static_slice_table[57])
 /* "access-control-allow-origin" */
-#define GRPC_MDSTR_ACCESS_CONTROL_ALLOW_ORIGIN (grpc_static_slice_table[60])
+#define GRPC_MDSTR_ACCESS_CONTROL_ALLOW_ORIGIN (grpc_static_slice_table[58])
 /* "age" */
-#define GRPC_MDSTR_AGE (grpc_static_slice_table[61])
+#define GRPC_MDSTR_AGE (grpc_static_slice_table[59])
 /* "allow" */
-#define GRPC_MDSTR_ALLOW (grpc_static_slice_table[62])
+#define GRPC_MDSTR_ALLOW (grpc_static_slice_table[60])
 /* "authorization" */
-#define GRPC_MDSTR_AUTHORIZATION (grpc_static_slice_table[63])
+#define GRPC_MDSTR_AUTHORIZATION (grpc_static_slice_table[61])
 /* "cache-control" */
-#define GRPC_MDSTR_CACHE_CONTROL (grpc_static_slice_table[64])
+#define GRPC_MDSTR_CACHE_CONTROL (grpc_static_slice_table[62])
 /* "content-disposition" */
-#define GRPC_MDSTR_CONTENT_DISPOSITION (grpc_static_slice_table[65])
+#define GRPC_MDSTR_CONTENT_DISPOSITION (grpc_static_slice_table[63])
 /* "content-language" */
-#define GRPC_MDSTR_CONTENT_LANGUAGE (grpc_static_slice_table[66])
+#define GRPC_MDSTR_CONTENT_LANGUAGE (grpc_static_slice_table[64])
 /* "content-length" */
-#define GRPC_MDSTR_CONTENT_LENGTH (grpc_static_slice_table[67])
+#define GRPC_MDSTR_CONTENT_LENGTH (grpc_static_slice_table[65])
 /* "content-location" */
-#define GRPC_MDSTR_CONTENT_LOCATION (grpc_static_slice_table[68])
+#define GRPC_MDSTR_CONTENT_LOCATION (grpc_static_slice_table[66])
 /* "content-range" */
-#define GRPC_MDSTR_CONTENT_RANGE (grpc_static_slice_table[69])
+#define GRPC_MDSTR_CONTENT_RANGE (grpc_static_slice_table[67])
 /* "cookie" */
-#define GRPC_MDSTR_COOKIE (grpc_static_slice_table[70])
+#define GRPC_MDSTR_COOKIE (grpc_static_slice_table[68])
 /* "date" */
-#define GRPC_MDSTR_DATE (grpc_static_slice_table[71])
+#define GRPC_MDSTR_DATE (grpc_static_slice_table[69])
 /* "etag" */
-#define GRPC_MDSTR_ETAG (grpc_static_slice_table[72])
+#define GRPC_MDSTR_ETAG (grpc_static_slice_table[70])
 /* "expect" */
-#define GRPC_MDSTR_EXPECT (grpc_static_slice_table[73])
+#define GRPC_MDSTR_EXPECT (grpc_static_slice_table[71])
 /* "expires" */
-#define GRPC_MDSTR_EXPIRES (grpc_static_slice_table[74])
+#define GRPC_MDSTR_EXPIRES (grpc_static_slice_table[72])
 /* "from" */
-#define GRPC_MDSTR_FROM (grpc_static_slice_table[75])
+#define GRPC_MDSTR_FROM (grpc_static_slice_table[73])
 /* "if-match" */
-#define GRPC_MDSTR_IF_MATCH (grpc_static_slice_table[76])
+#define GRPC_MDSTR_IF_MATCH (grpc_static_slice_table[74])
 /* "if-modified-since" */
-#define GRPC_MDSTR_IF_MODIFIED_SINCE (grpc_static_slice_table[77])
+#define GRPC_MDSTR_IF_MODIFIED_SINCE (grpc_static_slice_table[75])
 /* "if-none-match" */
-#define GRPC_MDSTR_IF_NONE_MATCH (grpc_static_slice_table[78])
+#define GRPC_MDSTR_IF_NONE_MATCH (grpc_static_slice_table[76])
 /* "if-range" */
-#define GRPC_MDSTR_IF_RANGE (grpc_static_slice_table[79])
+#define GRPC_MDSTR_IF_RANGE (grpc_static_slice_table[77])
 /* "if-unmodified-since" */
-#define GRPC_MDSTR_IF_UNMODIFIED_SINCE (grpc_static_slice_table[80])
+#define GRPC_MDSTR_IF_UNMODIFIED_SINCE (grpc_static_slice_table[78])
 /* "last-modified" */
-#define GRPC_MDSTR_LAST_MODIFIED (grpc_static_slice_table[81])
+#define GRPC_MDSTR_LAST_MODIFIED (grpc_static_slice_table[79])
 /* "lb-cost-bin" */
-#define GRPC_MDSTR_LB_COST_BIN (grpc_static_slice_table[82])
+#define GRPC_MDSTR_LB_COST_BIN (grpc_static_slice_table[80])
 /* "link" */
-#define GRPC_MDSTR_LINK (grpc_static_slice_table[83])
+#define GRPC_MDSTR_LINK (grpc_static_slice_table[81])
 /* "location" */
-#define GRPC_MDSTR_LOCATION (grpc_static_slice_table[84])
+#define GRPC_MDSTR_LOCATION (grpc_static_slice_table[82])
 /* "max-forwards" */
-#define GRPC_MDSTR_MAX_FORWARDS (grpc_static_slice_table[85])
+#define GRPC_MDSTR_MAX_FORWARDS (grpc_static_slice_table[83])
 /* "proxy-authenticate" */
-#define GRPC_MDSTR_PROXY_AUTHENTICATE (grpc_static_slice_table[86])
+#define GRPC_MDSTR_PROXY_AUTHENTICATE (grpc_static_slice_table[84])
 /* "proxy-authorization" */
-#define GRPC_MDSTR_PROXY_AUTHORIZATION (grpc_static_slice_table[87])
+#define GRPC_MDSTR_PROXY_AUTHORIZATION (grpc_static_slice_table[85])
 /* "range" */
-#define GRPC_MDSTR_RANGE (grpc_static_slice_table[88])
+#define GRPC_MDSTR_RANGE (grpc_static_slice_table[86])
 /* "referer" */
-#define GRPC_MDSTR_REFERER (grpc_static_slice_table[89])
+#define GRPC_MDSTR_REFERER (grpc_static_slice_table[87])
 /* "refresh" */
-#define GRPC_MDSTR_REFRESH (grpc_static_slice_table[90])
+#define GRPC_MDSTR_REFRESH (grpc_static_slice_table[88])
 /* "retry-after" */
-#define GRPC_MDSTR_RETRY_AFTER (grpc_static_slice_table[91])
+#define GRPC_MDSTR_RETRY_AFTER (grpc_static_slice_table[89])
 /* "server" */
-#define GRPC_MDSTR_SERVER (grpc_static_slice_table[92])
+#define GRPC_MDSTR_SERVER (grpc_static_slice_table[90])
 /* "set-cookie" */
-#define GRPC_MDSTR_SET_COOKIE (grpc_static_slice_table[93])
+#define GRPC_MDSTR_SET_COOKIE (grpc_static_slice_table[91])
 /* "strict-transport-security" */
-#define GRPC_MDSTR_STRICT_TRANSPORT_SECURITY (grpc_static_slice_table[94])
+#define GRPC_MDSTR_STRICT_TRANSPORT_SECURITY (grpc_static_slice_table[92])
 /* "transfer-encoding" */
-#define GRPC_MDSTR_TRANSFER_ENCODING (grpc_static_slice_table[95])
+#define GRPC_MDSTR_TRANSFER_ENCODING (grpc_static_slice_table[93])
 /* "vary" */
-#define GRPC_MDSTR_VARY (grpc_static_slice_table[96])
+#define GRPC_MDSTR_VARY (grpc_static_slice_table[94])
 /* "via" */
-#define GRPC_MDSTR_VIA (grpc_static_slice_table[97])
+#define GRPC_MDSTR_VIA (grpc_static_slice_table[95])
 /* "www-authenticate" */
-#define GRPC_MDSTR_WWW_AUTHENTICATE (grpc_static_slice_table[98])
+#define GRPC_MDSTR_WWW_AUTHENTICATE (grpc_static_slice_table[96])
 /* "identity,deflate" */
-#define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE (grpc_static_slice_table[99])
+#define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE (grpc_static_slice_table[97])
 /* "identity,gzip" */
-#define GRPC_MDSTR_IDENTITY_COMMA_GZIP (grpc_static_slice_table[100])
+#define GRPC_MDSTR_IDENTITY_COMMA_GZIP (grpc_static_slice_table[98])
 /* "deflate,gzip" */
-#define GRPC_MDSTR_DEFLATE_COMMA_GZIP (grpc_static_slice_table[101])
+#define GRPC_MDSTR_DEFLATE_COMMA_GZIP (grpc_static_slice_table[99])
 /* "identity,deflate,gzip" */
 #define GRPC_MDSTR_IDENTITY_COMMA_DEFLATE_COMMA_GZIP \
-  (grpc_static_slice_table[102])
+  (grpc_static_slice_table[100])
 
 extern const grpc_slice_refcount_vtable grpc_static_metadata_vtable;
 extern grpc_slice_refcount
@@ -590,5 +586,4 @@ extern const uint8_t grpc_static_accept_stream_encoding_metadata[4];
   (GRPC_MAKE_MDELEM(&grpc_static_mdelem_table                                  \
                         [grpc_static_accept_stream_encoding_metadata[(algs)]], \
                     GRPC_MDELEM_STORAGE_STATIC))
-
 #endif /* GRPC_CORE_LIB_TRANSPORT_STATIC_METADATA_H */