* bignum.c (rb_big_cmp): Specialize a comparison to zero.

* ext/bigdecimal/bigdecimal.c (is_negative): Use rb_big_cmp instead of
  RBIGNUM_NEGATIVE_P.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44910 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 1 deletions

diff --git a/bignum.c b/bignum.c
index 6c2cda3937..daaff252b6 100644
--- a/bignum.c
+++ b/bignum.c
@@ -5395,7 +5395,12 @@ rb_big_cmp(VALUE x, VALUE y)
 {
     int cmp;
 
-    if (FIXNUM_P(y)) {
+    if (y == INT2FIX(0)) {
+        if (BIGZEROP(x)) return INT2FIX(0);
+        if (RBIGNUM_NEGATIVE_P(x)) return INT2FIX(-1);
+        return INT2FIX(1);
+    }
+    else if (FIXNUM_P(y)) {
 	y = rb_int2big(FIX2LONG(y));
     }
     else if (RB_BIGNUM_TYPE_P(y)) {