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-rw-r--r--ChangeLog5
-rw-r--r--hash.c1
2 files changed, 6 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 5ab9d557fc..7a9587df42 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Jul 29 21:53:41 2013 Masaki Matsushita <glass.saga@gmail.com>
+
+ * hash.c (rb_hash_compare_by_id): don't call rb_hash_rehash()
+ if self.compare_by_identity? == true.
+
Mon Jul 29 21:29:48 2013 Masaki Matsushita <glass.saga@gmail.com>
* hash.c (rb_hash_assoc): performance improvement by replacing
diff --git a/hash.c b/hash.c
index 91a28ee569..70b6bd4ac9 100644
--- a/hash.c
+++ b/hash.c
@@ -2307,6 +2307,7 @@ rb_hash_flatten(int argc, VALUE *argv, VALUE hash)
static VALUE
rb_hash_compare_by_id(VALUE hash)
{
+ if (rb_hash_compare_by_id_p(hash)) return hash;
rb_hash_modify(hash);
RHASH(hash)->ntbl->type = &identhash;
rb_hash_rehash(hash);