1 files changed, 42 insertions, 0 deletions
diff --git a/third_party/skcms/src/Transform.c b/third_party/skcms/src/Transform.c
index 7428ea6be4..b6b3e8e320 100644
--- a/third_party/skcms/src/Transform.c
+++ b/third_party/skcms/src/Transform.c
@@ -7,6 +7,7 @@
 
 #include "../skcms.h"
 #include "LinearAlgebra.h"
+#include "Macros.h"
 #include "PortableMath.h"
 #include "TransferFunction.h"
 #include "Transform.h"
@@ -15,6 +16,47 @@
 #include <stdint.h>
 #include <string.h>
 
+#if defined(SKCMS_PROFILE)
+    // Basic profiling tools to time each Op.  Not at all thread safe.
+
+    #include <stdio.h>
+    #include <stdlib.h>
+
+    #define M(op) +1
+    static uint64_t cycles[FOREACH_Op(M)];
+    #undef M
+
+    static void profile_dump_stats() {
+    #define M(op) #op,
+        static const char* names[] = { FOREACH_Op(M) };
+    #undef M
+        for (int i = 0; i < ARRAY_COUNT(cycles); i++) {
+            if (cycles[i]) {
+                fprintf(stderr, "%16s: %12llu cycles\n", names[i], cycles[i]);
+            }
+        }
+    }
+
+    static Op profile_next_op(Op op) {
+        static uint64_t start    = 0;
+        static uint64_t* current = NULL;
+
+        if (!current) {
+            atexit(profile_dump_stats);
+        } else {
+            *current += __builtin_readcyclecounter() - start;
+        }
+
+        current = &cycles[op];
+        start   = __builtin_readcyclecounter();
+        return op;
+    }
+#else
+    static inline Op profile_next_op(Op op) {
+        return op;
+    }
+#endif
+
 #if defined(__clang__)
     typedef float    __attribute__((ext_vector_type(4)))   Fx4;
     typedef int32_t  __attribute__((ext_vector_type(4))) I32x4;