New submission from Serhiy Storchaka: Locale import is too slow in comparison with caching module in a global or even in sys.modules.
>>> import timeit >>> def f(): ... import locale ... >>> min(timeit.repeat(f, number=100000, repeat=10)) 0.4501200000013341 >>> _locale = None >>> def g(): ... global _locale ... if _locale is None: ... import _locale ... >>> min(timeit.repeat(g, number=100000, repeat=10)) 0.07821200000034878 >>> import sys >>> def h(): ... try: ... locale = sys.modules['locale'] ... except KeyError: ... import locale ... >>> min(timeit.repeat(h, number=100000, repeat=10)) 0.12357599999813829 I think there is an overhead of look up __import__, packing arguments in a tuple and calling a function. This can be omitted by looking first in sys.module and calling __import__ only when nothing was found. ---------- components: Interpreter Core messages: 228561 nosy: brett.cannon, eric.snow, ncoghlan, pitrou, serhiy.storchaka priority: normal severity: normal status: open title: Locale import is too slow type: performance versions: Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue22557> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
