[Python-checkins] r61102 - python/trunk/Modules/itertoolsmodule.c
christian.heimes
python-checkins at python.org
Thu Feb 28 12:18:50 CET 2008
Author: christian.heimes
Date: Thu Feb 28 12:18:49 2008
New Revision: 61102
Modified:
python/trunk/Modules/itertoolsmodule.c
Log:
The empty tuple is usually a singleton with a much higher refcnt than 1
Modified: python/trunk/Modules/itertoolsmodule.c
==============================================================================
--- python/trunk/Modules/itertoolsmodule.c (original)
+++ python/trunk/Modules/itertoolsmodule.c Thu Feb 28 12:18:49 2008
@@ -2111,8 +2111,11 @@
}
Py_DECREF(old_result);
}
- /* Now, we've got the only copy so we can update it in-place */
- assert (Py_REFCNT(result) == 1);
+ /* Now, we've got the only copy so we can update it in-place
+ * CPython's empty tuple is a singleton and cached in
+ * PyTuple's freelist.
+ */
+ assert(r == 0 || Py_REFCNT(result) == 1);
/* Scan indices right-to-left until finding one that is not
at its maximum (i + n - r). */
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