New submission from Raymond Hettinger: AFAICT, there is no reason for sets to incref and decref dummy objects. The dummy object address is used as placeholders in the hash table but it is never accessed by set the logic. As long the one reference is held at the time the dummy object is created, nothing further is served by the increfs and decrefs.
I can take them out entirely or use ifdefs to keep them for debug builds. Does anyone know of any issues? ---------- components: Interpreter Core files: no_refcnt_dummy1.diff keywords: patch messages: 195751 nosy: rhettinger priority: normal severity: normal status: open title: Don't needlessly change refcounts of dummy objects for sets type: performance versions: Python 3.4 Added file: http://bugs.python.org/file31394/no_refcnt_dummy1.diff _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue18797> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
