New submission from Rasmus Villemoes: Somewhat related to #23971, but with the opposite sign: Using Py_SIZE on a PyDictObject gives the ma_fill member in 2.7 (and until 3.2 AFAICT), not the ma_used member. So calling dict.fromkeys(d) overallocates significantly if a lot of elements have been deleted from d.
The fix is trivial, though one could of course avoid the function call and do a cast. Not sure this qualifies for 2.7, though. ---------- components: Interpreter Core files: fromkeys.patch keywords: patch messages: 283654 nosy: villemoes priority: normal severity: normal status: open title: dict.fromkeys overallocates when given a sparse dict type: resource usage versions: Python 2.7 Added file: http://bugs.python.org/file45973/fromkeys.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue29019> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
