When allocation rate is low and we are close to the new space limit, we should perform a scavenge d…

src/heap/gc-idle-time-handler.h

Index: src/heap/gc-idle-time-handler.h
diff --git a/src/heap/gc-idle-time-handler.h b/src/heap/gc-idle-time-handler.h
index 8f12a446f2a1609276cf8310f1e06030738dedc7..ebd132e7520d417cef036973a13d6e5f6f55bbc2 100644
--- a/src/heap/gc-idle-time-handler.h
+++ b/src/heap/gc-idle-time-handler.h
@@ -124,6 +124,10 @@ class GCIdleTimeHandler {
   // no idle notification happens.
   static const size_t kTimeUntilNextIdleEvent = 100;
 
+  // An allocation throughput below kLowAllocationThroughput bytes/ms is
+  // considered low
+  static const size_t kLowAllocationThroughput = 1000;
+
   // If we haven't recorded any scavenger events yet, we use a conservative
   // lower bound for the scavenger speed.
   static const size_t kInitialConservativeScavengeSpeed = 100 * KB;