Memory reducer should use the current allocation rate instead of the overall allocation rate.

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 684 matching lines @@
 }
 
 
 size_t GCTracer::AllocationThroughputInBytesPerMillisecond(
     double time_ms) const {
   return NewSpaceAllocationThroughputInBytesPerMillisecond(time_ms) +
          OldGenerationAllocationThroughputInBytesPerMillisecond(time_ms);
 }
 
 
+size_t GCTracer::CurrentNewSpaceAllocationThroughputInBytesPerMillisecond()
+    const {
+  return NewSpaceAllocationThroughputInBytesPerMillisecond(
+      kThroughputTimeFrameMs);
+}
+
+
 size_t GCTracer::CurrentOldGenerationAllocationThroughputInBytesPerMillisecond()
     const {
-  static const double kThroughputTimeFrame = 5000;
   return OldGenerationAllocationThroughputInBytesPerMillisecond(
-      kThroughputTimeFrame);
+      kThroughputTimeFrameMs);
 }
 
 
 double GCTracer::ContextDisposalRateInMilliseconds() const {
   if (context_disposal_events_.size() < kRingBufferMaxSize) return 0.0;
 
   double begin = base::OS::TimeCurrentMillis();
   double end = 0.0;
   ContextDisposalEventBuffer::const_iterator iter =
       context_disposal_events_.begin();
@@ skipping 21 matching lines @@
 
 
 bool GCTracer::SurvivalEventsRecorded() const {
   return survival_events_.size() > 0;
 }
 
 
 void GCTracer::ResetSurvivalEvents() { survival_events_.reset(); }
 }  // namespace internal
 }  // namespace v8