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+Thu Sep 29 20:07:36 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* use RB_TYPE_P which is optimized for constant types, instead of
+	  comparison with TYPE.
+
 Wed Sep 28 09:20:37 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* configure.in (pthread_np.h): needs pthread.h to be included