Optimize functions on a second thread.

src/v8globals.h

 // Copyright 2012 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 341 matching lines @@
   void* data;
 };
 
 
 // Logging and profiling.  A StateTag represents a possible state of
 // the VM. The logger maintains a stack of these. Creating a VMState
 // object enters a state by pushing on the stack, and destroying a
 // VMState object leaves a state by popping the current state from the
 // stack.
 
-#define STATE_TAG_LIST(V) \
-  V(JS)                   \
-  V(GC)                   \
-  V(COMPILER)             \
-  V(OTHER)                \
+#define STATE_TAG_LIST(V)                       \
+  V(JS)                                         \
+  V(GC)                                         \
+  V(COMPILER)                                   \
+  V(PARALLEL_COMPILER_PROLOGUE)                 \
+  V(OTHER)                                      \
   V(EXTERNAL)
 
 enum StateTag {
 #define DEF_STATE_TAG(name) name,
   STATE_TAG_LIST(DEF_STATE_TAG)
 #undef DEF_STATE_TAG
   // Pseudo-types.
   state_tag_count
 };
 
@@ skipping 169 matching lines @@
 
 enum ClearExceptionFlag {
   KEEP_EXCEPTION,
   CLEAR_EXCEPTION
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_V8GLOBALS_H_