Author serhiy.storchaka
Recipients brett.cannon, eric.snow, ncoghlan, serhiy.storchaka
Date 2018-02-25.08:46:54
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Message-id <1519548414.92.0.467229070634.issue32946@psf.upfronthosting.co.za>
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The proposed PR optimizes "from ... import ..." from non-package modules.

$ ./python -m perf timeit 'from locale import getlocale'
Unpatched:  Mean +- std dev: 811 ns +- 27 ns
Patched:    Mean +- std dev: 624 ns +- 17 ns

Currently _bootstrap._handle_fromlist() is called which does nothing if the module is not a package, but adds an overhead of calling a Python function. The PR moves this check out of _handle_fromlist and avoid calling it if not needed.
History
Date User Action Args
2018-02-25 08:46:54serhiy.storchakasetrecipients: + serhiy.storchaka, brett.cannon, ncoghlan, eric.snow
2018-02-25 08:46:54serhiy.storchakasetmessageid: <1519548414.92.0.467229070634.issue32946@psf.upfronthosting.co.za>
2018-02-25 08:46:54serhiy.storchakalinkissue32946 messages
2018-02-25 08:46:54serhiy.storchakacreate