Reduce boot-up memory use of V8.

src/platform-win32.cc

 // Copyright 2011 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 1508 matching lines @@
   explicit PlatformData(HANDLE thread) : thread_(thread) {}
   HANDLE thread_;
   unsigned thread_id_;
 };
 
 
 // Initialize a Win32 thread object. The thread has an invalid thread
 // handle until it is started.
 
 Thread::Thread(const Options& options)
-    : stack_size_(options.stack_size) {
+    : stack_size_(options.stack_size()) {
   data_ = new PlatformData(kNoThread);
-  set_name(options.name);
-}
-
-
-Thread::Thread(const char* name)
-    : stack_size_(0) {
-  data_ = new PlatformData(kNoThread);
-  set_name(name);
+  set_name(options.name());
 }
 
 
 void Thread::set_name(const char* name) {
   OS::StrNCpy(Vector<char>(name_, sizeof(name_)), name, strlen(name));
   name_[sizeof(name_) - 1] = '\0';
 }
 
 
 // Close our own handle for the thread.
@@ skipping 345 matching lines @@
 
   HANDLE profiled_thread() { return profiled_thread_; }
 
  private:
   HANDLE profiled_thread_;
 };
 
 
 class SamplerThread : public Thread {
  public:
+  static const int kSamplerThreadStackSize = 32 * KB;
+
   explicit SamplerThread(int interval)
-      : Thread("SamplerThread"),
+      : Thread(Thread::Options("SamplerThread", kSamplerThreadStackSize)),
         interval_(interval) {}
 
   static void AddActiveSampler(Sampler* sampler) {
     ScopedLock lock(mutex_);
     SamplerRegistry::AddActiveSampler(sampler);
     if (instance_ == NULL) {
       instance_ = new SamplerThread(sampler->interval());
       instance_->Start();
     } else {
       ASSERT(instance_->interval_ == sampler->interval());
@@ skipping 122 matching lines @@
 
 
 void Sampler::Stop() {
   ASSERT(IsActive());
   SamplerThread::RemoveActiveSampler(this);
   SetActive(false);
 }
 
 
 } }  // namespace v8::internal