Estimates node completion times for a TF graph based on the op level analytical

estimates.

PiperOrigin-RevId: 155698917

1 files changed, 4 insertions, 2 deletions

diff --git a/tensorflow/core/grappler/costs/cost_estimator.h b/tensorflow/core/grappler/costs/cost_estimator.h
index 27975458d4..b3fb3522a3 100644
--- a/tensorflow/core/grappler/costs/cost_estimator.h
+++ b/tensorflow/core/grappler/costs/cost_estimator.h
@@ -42,7 +42,8 @@ struct Costs {
   struct MicroSeconds : std::chrono::microseconds {
     MicroSeconds() : std::chrono::microseconds(0) {}
     MicroSeconds(double d) : std::chrono::microseconds(static_cast<int64>(d)) {}
-    MicroSeconds(std::chrono::microseconds& d) : std::chrono::microseconds(d) {}
+    MicroSeconds(const std::chrono::microseconds& d)
+        : std::chrono::microseconds(d) {}
     MicroSeconds& operator=(const std::chrono::microseconds& d) {
       std::chrono::microseconds::operator=(d);
       return *this;
@@ -51,7 +52,8 @@ struct Costs {
   struct NanoSeconds : std::chrono::nanoseconds {
     NanoSeconds() : std::chrono::nanoseconds(0) {}
     NanoSeconds(double d) : std::chrono::nanoseconds(static_cast<int64>(d)) {}
-    NanoSeconds(std::chrono::nanoseconds& d) : std::chrono::nanoseconds(d) {}
+    NanoSeconds(const std::chrono::nanoseconds& d)
+        : std::chrono::nanoseconds(d) {}
     NanoSeconds& operator=(const std::chrono::nanoseconds& d) {
       std::chrono::nanoseconds::operator=(d);
       return *this;