Track JS allocations as they arrive with no affection on performance when tracking is switched off

src/builtins.cc

 // Copyright 2012 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 256 matching lines @@
 
   // Maintain marking consistency for HeapObjectIterator and
   // IncrementalMarking.
   int size_delta = to_trim * entry_size;
   if (heap->marking()->TransferMark(elms->address(),
                                     elms->address() + size_delta)) {
     MemoryChunk::IncrementLiveBytesFromMutator(elms->address(), -size_delta);
   }
 
   HEAP_PROFILE(heap, ObjectMoveEvent(elms->address(),
-                                     elms->address() + size_delta));
+                                     elms->address() + size_delta,
+                                     elms->Size()));
   return FixedArrayBase::cast(HeapObject::FromAddress(
       elms->address() + to_trim * entry_size));
 }
 
 
 static bool ArrayPrototypeHasNoElements(Heap* heap,
                                         Context* native_context,
                                         JSObject* array_proto) {
   // This method depends on non writability of Object and Array prototype
   // fields.
@@ skipping 1523 matching lines @@
 }
 BUILTIN_LIST_C(DEFINE_BUILTIN_ACCESSOR_C)
 BUILTIN_LIST_A(DEFINE_BUILTIN_ACCESSOR_A)
 BUILTIN_LIST_H(DEFINE_BUILTIN_ACCESSOR_H)
 BUILTIN_LIST_DEBUG_A(DEFINE_BUILTIN_ACCESSOR_A)
 #undef DEFINE_BUILTIN_ACCESSOR_C
 #undef DEFINE_BUILTIN_ACCESSOR_A
 
 
 } }  // namespace v8::internal