Run Crankshaft on a separate thread.

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index 0c97abd89e8e186722834fad855f9adc4141783b..8ab9efe72ef89c4143ebaa9e0d99e9aa7ea9831f 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -41,6 +41,7 @@
 #include "lithium-allocator.h"
 #include "log.h"
 #include "messages.h"
+#include "optimizing-compiler-thread.h"
 #include "platform.h"
 #include "regexp-stack.h"
 #include "runtime-profiler.h"
@@ -1552,6 +1553,13 @@ void Isolate::Deinit() {
 
     if (FLAG_hydrogen_stats) HStatistics::Instance()->Print();
 
+    if (FLAG_optimize_in_parallel) {
+      ASSERT(optimizing_compiler_thread_);
+      optimizing_compiler_thread_->StopThread();
+      delete optimizing_compiler_thread_;
+      optimizing_compiler_thread_ = NULL;
+    }
+
     // We must stop the logger before we tear down other components.
     logger_->EnsureTickerStopped();
 
@@ -1592,6 +1600,12 @@ void Isolate::SetIsolateThreadLocals(Isolate* isolate,
 }
 
 
+void Isolate::queue_for_optimization(Handle<JSFunction> function) {
+  ASSERT(FLAG_optimize_in_parallel);
+  optimizing_compiler_thread_->QueueForOptimization(function);
+}
+
+
 Isolate::~Isolate() {
   TRACE_ISOLATE(destructor);
 
@@ -1864,6 +1878,11 @@ bool Isolate::Init(Deserializer* des) {
   CHECK_EQ(static_cast<int>(OFFSET_OF(Isolate, heap_.roots_)),
            Internals::kIsolateRootsOffset);
 
+  if (FLAG_optimize_in_parallel) {
+    optimizing_compiler_thread_ = new OptimizingCompilerThread(this);
+    optimizing_compiler_thread_->Start();
+  }
+
   state_ = INITIALIZED;
   time_millis_at_init_ = OS::TimeCurrentMillis();
   return true;