From da9f6cdcb774ae8ee052f9d05b0554a44dde2af4 Mon Sep 17 00:00:00 2001
From: glass <glass@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 2 Nov 2012 07:04:39 +0000
Subject: [PATCH] * array.c (recursive_equal): performance improvement.
 [ruby-dev:45412] [Feature #6177]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37420 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog |  5 +++++
 array.c   | 22 +++++++++++++++++++---
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index bf538d4d7b..3f05ea78cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Fri Nov  2 14:52:52 2012  Masaki Matsushita <glass.saga@gmail.com>
+
+	* array.c (recursive_equal): performance improvement.
+	  [ruby-dev:45412] [Feature #6177]
+
 Fri Nov  2 14:47:53 2012  Shugo Maeda  <shugo@ruby-lang.org>
 
 	* string.c (sym_to_proc, sym_call): A Proc created by Symbol#to_proc
diff --git a/array.c b/array.c
index e38c93b55f..ac6074d3c1 100644
--- a/array.c
+++ b/array.c
@@ -3270,11 +3270,27 @@ static VALUE
 recursive_equal(VALUE ary1, VALUE ary2, int recur)
 {
     long i;
+    VALUE *p1, *p2;
 
     if (recur) return Qtrue; /* Subtle! */
-    for (i=0; i<RARRAY_LEN(ary1); i++) {
-	if (!rb_equal(rb_ary_elt(ary1, i), rb_ary_elt(ary2, i)))
-	    return Qfalse;
+
+    p1 = RARRAY_PTR(ary1);
+    p2 = RARRAY_PTR(ary2);
+
+    for (i = 0; i < RARRAY_LEN(ary1); i++) {
+	if (*p1 != *p2) {
+	    if (rb_equal(*p1, *p2)) {
+		if (RARRAY_LEN(ary1) != RARRAY_LEN(ary2))
+		    return Qfalse;
+		p1 = RARRAY_PTR(ary1) + i;
+		p2 = RARRAY_PTR(ary2) + i;
+	    }
+	    else {
+		return Qfalse;
+	    }
+	}
+	p1++;
+	p2++;
     }
     return Qtrue;
 }