glass	2012-11-08 22:40:33 +0900 (Thu, 08 Nov 2012)

  New Revision: 37564

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=37564

  Log:
    * re.c (rb_memsearch): performance improvement by using memchr().
      [ruby-dev:45397] [Feature #6173]

  Modified files:
    trunk/ChangeLog
    trunk/re.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 37563)
+++ ChangeLog	(revision 37564)
@@ -1,3 +1,8 @@
+Thu Nov  8 21:57:59 2012  Masaki Matsushita  <glass.saga@g...>
+
+	* re.c (rb_memsearch): performance improvement by using memchr().
+	  [ruby-dev:45397] [Feature #6173]
+
 Thu Nov  8 19:02:50 2012  NARUSE, Yui  <naruse@r...>
 
 	* lib/net/protocol.rb (Net::InternetMessageIO#each_crlf_line):
Index: re.c
===================================================================
--- re.c	(revision 37563)
+++ re.c	(revision 37564)
@@ -220,12 +220,12 @@
 	return 0;
     }
     else if (m == 1) {
-	const unsigned char *ys = y, *ye = ys + n;
-	for (; y < ye; ++y) {
-	    if (*x == *y)
-		return y - ys;
-	}
-	return -1;
+	const unsigned char *ys;
+
+	if (ys = memchr(y, *x, n))
+	    return ys - y;
+	else
+	    return -1;
     }
     else if (m <= SIZEOF_VALUE) {
 	return rb_memsearch_ss(x0, m, y0, n);

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