Hide RegExp and String initialization in a closure.

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 310 matching lines @@
 }
 
 
 void V8::SetSnapshotDataBlob(StartupData* snapshot_blob) {
   i::V8::SetSnapshotBlob(snapshot_blob);
 }
 
 
 bool RunExtraCode(Isolate* isolate, const char* utf8_source) {
   // Run custom script if provided.
+  base::ElapsedTimer timer;
+  timer.Start();
   TryCatch try_catch;
   Local<String> source_string = String::NewFromUtf8(isolate, utf8_source);
   if (try_catch.HasCaught()) return false;
   ScriptOrigin origin(String::NewFromUtf8(isolate, "<embedded script>"));
   ScriptCompiler::Source source(source_string, origin);
   Local<Script> script = ScriptCompiler::Compile(isolate, &source);
   if (try_catch.HasCaught()) return false;
   script->Run();
+  if (i::FLAG_profile_deserialization) {
+    i::PrintF("Executing custom snapshot script took %0.3f ms\n",
+              timer.Elapsed().InMillisecondsF());
+  }
+  timer.Stop();
   return !try_catch.HasCaught();
 }
 
 
 StartupData V8::CreateSnapshotDataBlob(const char* custom_source) {
   i::Isolate* internal_isolate = new i::Isolate(true);
   Isolate* isolate = reinterpret_cast<Isolate*>(internal_isolate);
   StartupData result = {NULL, 0};
   {
+    base::ElapsedTimer timer;
+    timer.Start();
     Isolate::Scope isolate_scope(isolate);
     internal_isolate->Init(NULL);
     Persistent<Context> context;
     i::Snapshot::Metadata metadata;
     {
       HandleScope handle_scope(isolate);
       Handle<Context> new_context = Context::New(isolate);
       context.Reset(isolate, new_context);
       if (custom_source != NULL) {
         metadata.set_embeds_script(true);
@@ skipping 19 matching lines @@
       i::StartupSerializer ser(internal_isolate, &snapshot_sink);
       ser.SerializeStrongReferences();
 
       i::SnapshotByteSink context_sink;
       i::PartialSerializer context_ser(internal_isolate, &ser, &context_sink);
       context_ser.Serialize(&raw_context);
       ser.SerializeWeakReferences();
 
       result = i::Snapshot::CreateSnapshotBlob(ser, context_ser, metadata);
     }
+    if (i::FLAG_profile_deserialization) {
+      i::PrintF("Creating snapshot took %0.3f ms\n",
+                timer.Elapsed().InMillisecondsF());
+    }
+    timer.Stop();
   }
   isolate->Dispose();
   return result;
 }
 
 
 void V8::SetFlagsFromString(const char* str, int length) {
   i::FlagList::SetFlagsFromString(str, length);
 }
 
@@ skipping 7579 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal