Fix performance regressions due to lazy initialization.

src/v8.cc

Index: src/v8.cc
diff --git a/src/v8.cc b/src/v8.cc
index 65d95bf54f2a4e19fa8b56121a75ab2054822448..8df43c26e13ae1b86f50cff61283245dfe949de4 100644
--- a/src/v8.cc
+++ b/src/v8.cc
@@ -258,6 +258,8 @@ void V8::InitializeOncePerProcessImpl() {
     use_crankshaft_ = false;
   }
 
+  OS::PostSetUp();
+
   RuntimeProfiler::GlobalSetup();
 
   ElementsAccessor::InitializeOncePerProcess();
@@ -268,6 +270,7 @@ void V8::InitializeOncePerProcessImpl() {
     FLAG_max_new_space_size = (1 << (kPageSizeBits - 10)) * 2;
   }
 
+  Isolate::GlobalSetup();
   LOperand::SetUpCaches();
 }