Move quadratic behavior of Context's optimized function list verification behind --enable-slow-asse…

src/contexts.cc

Index: src/contexts.cc
diff --git a/src/contexts.cc b/src/contexts.cc
index 76784bd704602b955924c6255c8883b013b1e624..7e671252c8f34def676b7147a6801d7a412c5d59 100644
--- a/src/contexts.cc
+++ b/src/contexts.cc
@@ -243,10 +243,12 @@ Handle<Object> Context::Lookup(Handle<String> name,
 void Context::AddOptimizedFunction(JSFunction* function) {
   ASSERT(IsGlobalContext());
 #ifdef DEBUG
-  Object* element = get(OPTIMIZED_FUNCTIONS_LIST);
-  while (!element->IsUndefined()) {
-    CHECK(element != function);
-    element = JSFunction::cast(element)->next_function_link();
+  if (FLAG_enable_slow_asserts) {
+    Object* element = get(OPTIMIZED_FUNCTIONS_LIST);
+    while (!element->IsUndefined()) {
+      CHECK(element != function);
+      element = JSFunction::cast(element)->next_function_link();
+    }
   }
 
   CHECK(function->next_function_link()->IsUndefined());