* hash.c (env_each_pair): do not call rb_assoc_new() if

  it isn't needed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43020 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 2 deletions

diff --git a/hash.c b/hash.c
index 1098118737..8c72da2c05 100644
--- a/hash.c
+++ b/hash.c
@@ -2901,8 +2901,15 @@ env_each_pair(VALUE ehash)
     }
     FREE_ENVIRON(environ);
 
-    for (i=0; i<RARRAY_LEN(ary); i+=2) {
-	rb_yield(rb_assoc_new(RARRAY_AREF(ary, i), RARRAY_AREF(ary, i+1)));
+    if (rb_block_arity() > 1) {
+	for (i=0; i<RARRAY_LEN(ary); i+=2) {
+	    rb_yield_values(2, RARRAY_AREF(ary, i), RARRAY_AREF(ary, i+1));
+	}
+    }
+    else {
+	for (i=0; i<RARRAY_LEN(ary); i+=2) {
+	    rb_yield(rb_assoc_new(RARRAY_AREF(ary, i), RARRAY_AREF(ary, i+1)));
+	}
     }
     return ehash;
 }