Only pass idle notifications on from the API if V8 has been...

src/heap.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 825 matching lines @@
   }
 
   // True if we have reached the allocation limit in the old generation that
   // should artificially cause a GC right now.
   static bool OldGenerationAllocationLimitReached() {
     return (PromotedSpaceSize() + PromotedExternalMemorySize())
            > old_gen_allocation_limit_;
   }
 
   // Can be called when the embedding application is idle.
-  static bool IdleNotification() {
-    static const int kIdlesBeforeCollection = 7;
-    static int number_idle_notifications = 0;
-    static int last_gc_count = gc_count_;
-
-    bool finished = false;
-
-    if (last_gc_count == gc_count_) {
-      number_idle_notifications++;
-    } else {
-      number_idle_notifications = 0;
-      last_gc_count = gc_count_;
-    }
-
-    if (number_idle_notifications >= kIdlesBeforeCollection) {
-      // The first time through we collect without forcing compaction.
-      // The second time through we force compaction and quit.
-      bool force_compaction =
-          number_idle_notifications > kIdlesBeforeCollection;
-      CollectAllGarbage(force_compaction);
-      last_gc_count = gc_count_;
-      if (force_compaction) {
-        number_idle_notifications = 0;
-        finished = true;
-      }
-    }
-
-    // Uncommit unused memory in new space.
-    Heap::UncommitFromSpace();
-    return finished;
-  }
+  static bool IdleNotification();
 
   // Declare all the root indices.
   enum RootListIndex {
 #define ROOT_INDEX_DECLARATION(type, name, camel_name) k##camel_name##RootIndex,
     STRONG_ROOT_LIST(ROOT_INDEX_DECLARATION)
 #undef ROOT_INDEX_DECLARATION
 
 // Utility type maps
 #define DECLARE_STRUCT_MAP(NAME, Name, name) k##Name##MapRootIndex,
   STRUCT_LIST(DECLARE_STRUCT_MAP)
@@ skipping 642 matching lines @@
   int marked_count_;
 
   // The count from the end of the previous full GC.  Will be zero if there
   // was no previous full GC.
   int previous_marked_count_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_