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+Mon Jul 22 17:24:14 2013  Masaki Matsushita  <glass.saga@gmail.com>
+
+	* string.c (rb_str_each_char_size): performance implement by
+	  using rb_str_length().
+
 Mon Jul 22 16:32:48 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* vm_eval.c (eval_string_with_cref): check by Check_TypedStruct