re._compiled_typed's lru_cache causes significant degradation of the mako_v2 bench

pjenvey

BPO	16389
Nosy	@warsaw, @brettcannon, @rhettinger, @terryjreedy, @jcea, @ncoghlan, @pitrou, @pjenvey, @ezio-melotti, @asvetlov, @serhiy-storchaka
Files	re_compile_cache.patch issue16389.diff

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/serhiy-storchaka'
closed_at = <Date 2013-04-06.05:29:33.531>
created_at = <Date 2012-11-02.18:23:35.015>
labels = ['library', 'performance']
title = "re._compiled_typed's lru_cache causes significant degradation of the mako_v2 bench"
updated_at = <Date 2013-04-06.05:29:33.530>
user = 'https://github.com/pjenvey'

bugs.python.org fields:

activity = <Date 2013-04-06.05:29:33.530>
actor = 'serhiy.storchaka'
assignee = 'serhiy.storchaka'
closed = True
closed_date = <Date 2013-04-06.05:29:33.531>
closer = 'serhiy.storchaka'
components = ['Library (Lib)']
creation = <Date 2012-11-02.18:23:35.015>
creator = 'pjenvey'
dependencies = []
files = ['27877', '27895']
hgrepos = []
issue_num = 16389
keywords = ['patch', '3.2regression', '3.3regression']
message_count = 27.0
messages = ['174550', '174559', '174563', '174566', '174567', '174570', '174598', '174599', '174626', '174630', '174638', '174772', '174918', '174924', '174927', '174993', '175037', '181601', '182192', '182199', '183856', '183857', '183913', '183917', '183967', '183968', '184353']
nosy_count = 15.0
nosy_names = ['barry', 'brett.cannon', 'rhettinger', 'terry.reedy', 'jcea', 'ncoghlan', 'pitrou', 'pjenvey', 'ezio.melotti', 'zzzeek', 'asvetlov', 'python-dev', 'sbt', 'serhiy.storchaka', 'bdkearns']
pr_nums = []
priority = 'high'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue16389'
versions = ['Python 3.2', 'Python 3.3', 'Python 3.4']