Rewrote equality check in CompareStub to do quick pointer comparison first.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index cf5c5a5a7d6e34bbb65fd39a3556aa33ebe6d054..bb1804b65d577fd9f0b6771254d6c1a370731f03 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -2387,7 +2387,7 @@ THREADED_TEST(UndetectableObject) {
   ExpectBoolean("undetectable==undetectable", true);
 
   ExpectBoolean("undetectable===null", false);
-  ExpectBoolean("undetectable===undefined", true);
+  ExpectBoolean("undetectable===undefined", false);
   ExpectBoolean("undetectable===undetectable", true);
 }
 
@@ -2422,7 +2422,7 @@ THREADED_TEST(UndetectableString) {
   ExpectBoolean("undetectable==undetectable", true);
 
   ExpectBoolean("undetectable===null", false);
-  ExpectBoolean("undetectable===undefined", true);
+  ExpectBoolean("undetectable===undefined", false);
   ExpectBoolean("undetectable===undetectable", true);
 }