- Added a map cache for literal objects. This will...

src/factory.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 149 matching lines @@
   // structures in the heap.
   static Handle<JSObject> NewNeanderObject();
 
   static Handle<JSObject> NewArgumentsObject(Handle<Object> callee, int length);
 
   // JS objects are pretenured when allocated by the bootstrapper and
   // runtime.
   static Handle<JSObject> NewJSObject(Handle<JSFunction> constructor,
                                       PretenureFlag pretenure = NOT_TENURED);
 
+  // JS objects are pretenured when allocated by the bootstrapper and
+  // runtime.
+  static Handle<JSObject> NewJSObjectFromMap(Handle<Map> map);
+
   // Allocate a JS object representing an object literal.  The object is
   // pretenured (allocated directly in the old generation).
   static Handle<JSObject> NewObjectLiteral(int expected_number_of_properties);
 
   // Allocate a JS array representing an array literal.  The array is
   // pretenured (allocated directly in the old generation).
   static Handle<JSArray> NewArrayLiteral(int length);
 
   // JS arrays are pretenured when allocated by the parser.
   static Handle<JSArray> NewJSArray(int init_length,
@@ skipping 104 matching lines @@
 #undef SYMBOL_ACCESSOR
 
   static Handle<SharedFunctionInfo> NewSharedFunctionInfo(Handle<String> name);
 
   static Handle<Dictionary> DictionaryAtNumberPut(Handle<Dictionary>,
                                                   uint32_t key,
                                                   Handle<Object> value);
 
   static Handle<DebugInfo> NewDebugInfo(Handle<SharedFunctionInfo> shared);
 
+
+  // Return a map using the map cache in the global context.
+  // The key the an ordered set of property names.
+  static Handle<Map> ObjectLiteralMapFromCache(Handle<Context> context,
+                                               Handle<FixedArray> keys);
+
  private:
   static Handle<JSFunction> NewFunctionHelper(Handle<String> name,
                                               Handle<Object> prototype);
 
   static Handle<DescriptorArray> CopyAppendCallbackDescriptors(
       Handle<DescriptorArray> array,
       Handle<Object> descriptors);
 
   static Handle<JSFunction> BaseNewFunctionFromBoilerplate(
       Handle<JSFunction> boilerplate,
       Handle<Map> function_map);
+
+  // Create a new map cache.
+  static Handle<MapCache> NewMapCache(int at_least_space_for);
+
+  // Update the map cache in the global context with (keys, map)
+  static Handle<MapCache> AddToMapCache(Handle<Context> context,
+                                        Handle<FixedArray> keys,
+                                        Handle<Map> map);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FACTORY_H_