* bignum.c (bigzero_p): removing BDIGITS() inside of the

  loop. inspired by Hitohiro Kanai's blog entry
  <http://d.hatena.ne.jp/CanI/20090807/1249657492>.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@24444 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 1 deletions

diff --git a/bignum.c b/bignum.c
index bd9e0c8cae..9fa1f2aab3 100644
--- a/bignum.c
+++ b/bignum.c
@@ -46,8 +46,10 @@ static int
 bigzero_p(VALUE x)
 {
     long i;
+    BDIGIT *ds = BDIGITS(x);
+
     for (i = RBIGNUM_LEN(x) - 1; 0 <= i; i--) {
-	if (BDIGITS(x)[i]) return 0;
+	if (ds[i]) return 0;
     }
     return 1;
 }