Fast path for searching through simple transitions

src/transitions-inl.h

Index: src/transitions-inl.h
diff --git a/src/transitions-inl.h b/src/transitions-inl.h
index 2df30028317e0c64e71c7f8edfc39e706cbd4339..cfaa99d737ac411cb92fc01b9a94e106e8dcaad1 100644
--- a/src/transitions-inl.h
+++ b/src/transitions-inl.h
@@ -191,6 +191,11 @@ PropertyDetails TransitionArray::GetTargetDetails(int transition_number) {
 
 
 int TransitionArray::Search(String* name) {
+  if (IsSimpleTransition()) {
+    String* key = GetKey(kSimpleTransitionIndex);
+    if (key->Equals(name)) return kSimpleTransitionIndex;
+    return kNotFound;
+  }
   return internal::Search<ALL_ENTRIES>(this, name);
 }