Sample allocation throughput in all idle notifications.

src/heap/gc-tracer.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/heap/gc-tracer.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 255 matching lines @@
     old_generation_allocation_counter_bytes_ = old_generation_counter_bytes;
     return;
   }
   // This assumes that counters are unsigned integers so that the subtraction
   // below works even if the new counter is less then the old counter.
   size_t new_space_allocated_bytes =
       new_space_counter_bytes - new_space_allocation_counter_bytes_;
   size_t old_generation_allocated_bytes =
       old_generation_counter_bytes - old_generation_allocation_counter_bytes_;
   double duration = current_ms - allocation_time_ms_;
-  const double kMinDurationMs = 1;
+  const double kMinDurationMs = 100;
   if (duration < kMinDurationMs) {
     // Do not sample small durations to avoid precision errors.
     return;
   }
   allocation_time_ms_ = current_ms;
   new_space_allocation_counter_bytes_ = new_space_counter_bytes;
   old_generation_allocation_counter_bytes_ = old_generation_counter_bytes;
   allocation_duration_since_gc_ += duration;
   new_space_allocation_in_bytes_since_gc_ += new_space_allocated_bytes;
   old_generation_allocation_in_bytes_since_gc_ +=
@@ skipping 403 matching lines @@
 
 
 bool GCTracer::SurvivalEventsRecorded() const {
   return survival_events_.size() > 0;
 }
 
 
 void GCTracer::ResetSurvivalEvents() { survival_events_.reset(); }
 }  // namespace internal
 }  // namespace v8