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+Sun Feb 20 16:23:52 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* prevent temporary objects from GC, and should not use
+	  RSTRING_PTR() for function calls since it evaluates the argument
+	  a couple of times.
+
 Sun Feb 20 16:22:53 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* file.c (rb_file_flock): use rb_thread_io_blocking_region for the