Allocate as many object-literal properties as possible inobject....

src/heap.cc

 // 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 2275 matching lines @@
   FixedArray* result = FixedArray::cast(obj);
   result->set_length(len);
   // Copy the content
   WriteBarrierMode mode = result->GetWriteBarrierMode();
   for (int i = 0; i < len; i++) result->set(i, src->get(i), mode);
   return result;
 }
 
 
 Object* Heap::AllocateFixedArray(int length) {
+  if (length == 0) return empty_fixed_array();
   Object* result = AllocateRawFixedArray(length);
   if (!result->IsFailure()) {
     // Initialize header.
     reinterpret_cast<Array*>(result)->set_map(fixed_array_map());
     FixedArray* array = FixedArray::cast(result);
     array->set_length(length);
     Object* value = undefined_value();
     // Initialize body.
     for (int index = 0; index < length; index++) {
       array->set(index, value, SKIP_WRITE_BARRIER);
@@ skipping 1050 matching lines @@
 #ifdef DEBUG
 bool Heap::GarbageCollectionGreedyCheck() {
   ASSERT(FLAG_gc_greedy);
   if (Bootstrapper::IsActive()) return true;
   if (disallow_allocation_failure()) return true;
   return CollectGarbage(0, NEW_SPACE);
 }
 #endif
 
 } }  // namespace v8::internal