Reapplying r5147 (caching maps for slow case objects)....

src/bootstrapper.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 214 matching lines @@
   void HookUpInnerGlobal(Handle<GlobalObject> inner_global);
   // New context initialization.  Used for creating a context from scratch.
   void InitializeGlobal(Handle<GlobalObject> inner_global,
                         Handle<JSFunction> empty_function);
   // Installs the contents of the native .js files on the global objects.
   // Used for creating a context from scratch.
   void InstallNativeFunctions();
   bool InstallNatives();
   void InstallCustomCallGenerators();
   void InstallJSFunctionResultCaches();
+  void InitializeNormalizedMapCaches();
   // Used both for deserialized and from-scratch contexts to add the extensions
   // provided.
   static bool InstallExtensions(Handle<Context> global_context,
                                 v8::ExtensionConfiguration* extensions);
   static bool InstallExtension(const char* name);
   static bool InstallExtension(v8::RegisteredExtension* current);
   static void InstallSpecialObjects(Handle<Context> global_context);
   bool InstallJSBuiltins(Handle<JSBuiltinsObject> builtins);
   bool ConfigureApiObject(Handle<JSObject> object,
                           Handle<ObjectTemplateInfo> object_template);
@@ skipping 1148 matching lines @@
 
   int index = 0;
 #define F(size, func) caches->set(index++, CreateCache(size, func));
     JSFUNCTION_RESULT_CACHE_LIST(F)
 #undef F
 
   global_context()->set_jsfunction_result_caches(*caches);
 }
 
 
+void Genesis::InitializeNormalizedMapCaches() {
+  Handle<FixedArray> array(
+      Factory::NewFixedArray(NormalizedMapCache::kEntries, TENURED));
+  global_context()->set_normalized_map_cache(NormalizedMapCache::cast(*array));
+}
+
+
 int BootstrapperActive::nesting_ = 0;
 
 
 bool Bootstrapper::InstallExtensions(Handle<Context> global_context,
                                      v8::ExtensionConfiguration* extensions) {
   BootstrapperActive active;
   SaveContext saved_context;
   Top::set_context(*global_context);
   if (!Genesis::InstallExtensions(global_context, extensions)) return false;
   Genesis::InstallSpecialObjects(global_context);
@@ skipping 348 matching lines @@
   } else {
     // We get here if there was no context snapshot.
     CreateRoots();
     Handle<JSFunction> empty_function = CreateEmptyFunction();
     Handle<GlobalObject> inner_global;
     Handle<JSGlobalProxy> global_proxy =
         CreateNewGlobals(global_template, global_object, &inner_global);
     HookUpGlobalProxy(inner_global, global_proxy);
     InitializeGlobal(inner_global, empty_function);
     InstallJSFunctionResultCaches();
+    InitializeNormalizedMapCaches();
     if (!InstallNatives()) return;
 
     MakeFunctionInstancePrototypeWritable();
 
     if (!ConfigureGlobalObjects(global_template)) return;
     i::Counters::contexts_created_from_scratch.Increment();
   }
 
   result_ = global_context_;
 }
@@ skipping 39 matching lines @@
 }
 
 
 // Restore statics that are thread local.
 char* BootstrapperActive::RestoreState(char* from) {
   nesting_ = *reinterpret_cast<int*>(from);
   return from + sizeof(nesting_);
 }
 
 } }  // namespace v8::internal