New submission from Brett Cannon: The Mako developers discovered that under Python 3.3 their library under the mako_v2 benchmark went from 2.95x slower than Python 2.7 to 1.25x slower by simply avoiding an re compilation: http://www.makotemplates.org/trac/changeset/c1468b12f115ac9e469150ce24ea042aeae5e270
Their profiling showed that functools.lru_cache in rc._compiled_typed was a major contributor: http://paste.ofcode.org/yZRKnJfTsHesFR8hMWfc7f ---------- components: Library (Lib) messages: 174554 nosy: brett.cannon, pjenvey priority: normal severity: normal stage: needs patch status: open title: re compilation slow in Python 3.3 due to functools.lru_cache overhead type: performance versions: Python 3.4 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue16390> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
