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

src/handles.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 81 matching lines @@
 }
 
 
 void SetExpectedNofPropertiesFromEstimate(Handle<JSFunction> func,
                                           int estimate) {
   SetExpectedNofProperties(
       func, ExpectedNofPropertiesFromEstimate(estimate));
 }
 
 
-void NormalizeProperties(Handle<JSObject> object) {
-  CALL_HEAP_FUNCTION_VOID(object->NormalizeProperties());
+void NormalizeProperties(Handle<JSObject> object,
+                         PropertyNormalizationMode mode) {
+  CALL_HEAP_FUNCTION_VOID(object->NormalizeProperties(mode));
 }
 
 
 void NormalizeElements(Handle<JSObject> object) {
   CALL_HEAP_FUNCTION_VOID(object->NormalizeElements());
 }
 
 
 void TransformToFastProperties(Handle<JSObject> object,
                                int unused_property_fields) {
@@ skipping 333 matching lines @@
 }
 
 OptimizedObjectForAddingMultipleProperties::
 OptimizedObjectForAddingMultipleProperties(Handle<JSObject> object,
                                            bool condition) {
   object_ = object;
   if (condition && object_->HasFastProperties()) {
     // Normalize the properties of object to avoid n^2 behavior
     // when extending the object multiple properties.
     unused_property_fields_ = object->map()->unused_property_fields();
-    NormalizeProperties(object_);
+    NormalizeProperties(object_, KEEP_INOBJECT_PROPERTIES);
     has_been_transformed_ = true;
 
   } else {
     has_been_transformed_ = false;
   }
 }
 
 
 OptimizedObjectForAddingMultipleProperties::
 ~OptimizedObjectForAddingMultipleProperties() {
@@ skipping 66 matching lines @@
                Handle<Context> compile_context,
                Handle<Context> function_context) {
   Handle<FixedArray> arr = Factory::NewFixedArray(3);
   arr->set(0, Smi::FromInt(index));
   arr->set(1, *compile_context);  // Compile in this context
   arr->set(2, *function_context);  // Set function context to this
   fun->shared()->set_lazy_load_data(*arr);
 }
 
 } }  // namespace v8::internal