From 351cc2d7c9b942a34e19ef6e832a5358a99b32e4 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 10 Jan 2017 13:41:18 +0000
Subject: rational.c: short circuit optimization

* rational.c (nurat_reduce): short circuit when arguments are ONE,
  nothing is needed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57299 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 rational.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'rational.c')

diff --git a/rational.c b/rational.c
index 212ad07faa..26324899e5 100644
--- a/rational.c
+++ b/rational.c
@@ -488,7 +488,9 @@ nurat_canonicalize(VALUE *num, VALUE *den)
 static void
 nurat_reduce(VALUE *x, VALUE *y)
 {
-    VALUE gcd = f_gcd(*x, *y);
+    VALUE gcd;
+    if (*x == ONE || *y == ONE) return;
+    gcd = f_gcd(*x, *y);
     *x = f_idiv(*x, gcd);
     *y = f_idiv(*y, gcd);
 }
-- 
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