Avoid dictionary expansion during bootstrapping

src/runtime.cc

 // Copyright 2006-2009 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 250 matching lines @@
 
   bool is_result_from_cache;
   Handle<Map> map = ComputeObjectLiteralMap(context,
                                             constant_properties,
                                             &is_result_from_cache);
 
   Handle<JSObject> boilerplate = Factory::NewJSObjectFromMap(map);
   {  // Add the constant properties to the boilerplate.
     int length = constant_properties->length();
     OptimizedObjectForAddingMultipleProperties opt(boilerplate,
+                                                   length / 2,
                                                    !is_result_from_cache);
     for (int index = 0; index < length; index +=2) {
       Handle<Object> key(constant_properties->get(index+0));
       Handle<Object> value(constant_properties->get(index+1));
       if (value->IsFixedArray()) {
         // The value contains the constant_properties of a
         // simple object literal.
         Handle<FixedArray> array = Handle<FixedArray>::cast(value);
         value = CreateLiteralBoilerplate(literals, array);
         if (value.is_null()) return value;
@@ skipping 2745 matching lines @@
   }
   return *object;
 }
 
 
 static Object* Runtime_ToSlowProperties(Arguments args) {
   ASSERT(args.length() == 1);
   Handle<Object> object = args.at<Object>(0);
   if (object->IsJSObject()) {
     Handle<JSObject> js_object = Handle<JSObject>::cast(object);
-    js_object->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES);
+    js_object->NormalizeProperties(CLEAR_INOBJECT_PROPERTIES, 0);
   }
   return *object;
 }
 
 
 static Object* Runtime_ToBool(Arguments args) {
   NoHandleAllocation ha;
   ASSERT(args.length() == 1);
 
   return args[0]->ToBoolean();
@@ skipping 4553 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage();
   }
 }
 
 
 } }  // namespace v8::internal