Antoine Pitrou added the comment: Here is a patch. Micro-benchmark:
$ ./python -m timeit -s "l=[]; it=(x for x in ())" "l.extend(it)" -> before: 0.449 usec per loop -> after: 0.179 usec per loop ---------- keywords: +patch Added file: http://bugs.python.org/file32318/lengthhint.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue19369> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
