New submission from Serhiy Storchaka: Here is a patch which speed up compiling of regular expressions with big charsets.
Microbenchmark: $ ./python -m timeit "from sre_compile import compile; r = '[%s]' % ''.join(map(chr, range(256, 2**16, 255)))" "compile(r, 0)" Unpatched (but with fixed issue19327): 119 msec per loop Patched: 59.6 msec per loop Compiling regular expressions with big charset was main cause of slowing down importing the email.message module (issue11454). ---------- assignee: serhiy.storchaka components: Library (Lib), Regular Expressions files: re_mk_bitmap.patch keywords: patch messages: 200755 nosy: ezio.melotti, haypo, mrabarnett, serhiy.storchaka priority: normal severity: normal stage: patch review status: open title: Faster compiling of big charset regexpes type: performance versions: Python 3.4 Added file: http://bugs.python.org/file32278/re_mk_bitmap.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue19329> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
