On 28.09.2021 10:22, Marc-Andre Lemburg wrote: > On 27.09.2021 18:51, Eric Snow wrote: >> We've frozen most of the stdlib modules imported during "python -c >> pass" [1][2], to make startup a bit faster. Import of those modules >> is controlled by "-X frozen_modules=[on|off]". Currently it defaults >> to "off" but we'd like to default to "on". The blocker is the impact >> on contributors. I expect many will make changes to a stdlib module >> and then puzzle over why those changes aren't getting used. That's an >> annoyance we can avoid, which is the point of this thread. >> >> Possible solutions: >> >> 1. always default to "on" (the annoyance for contributors isn't big enough?) >> 2. default to "on" if it's a PGO build (and "off" otherwise) >> 3. default to "on" unless running from the source tree >> >> Thoughts? > > #3 sounds like a good solution, but how would you detect "running > from the source tree" ? This sounds like you need another stat call > somewhere, which is what the frozen modules try to avoid. > > I'd like to suggest adding an environment variable to enable / > disable the setting instead. This makes it easy to customize the > behavior without introducing complicated logic.
Just to clarify: the modules would still always be frozen with the env var setting, but Python would simply not import them as frozen modules, but instead go and look on the PYTHONPATH for the modules. This could be achieved by special casing the frozen module finder function to only trigger on importlib modules and return NULL for all other possibly frozen modules. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Sep 28 2021) >>> Python Projects, Coaching and Support ... https://www.egenix.com/ >>> Python Product Development ... https://consulting.egenix.com/ ________________________________________________________________________ ::: We implement business ideas - efficiently in both time and costs ::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 https://www.egenix.com/company/contact/ https://www.malemburg.com/ _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/XVEVVUFUXNDM7LQPWPPDOWITW2HXMPPK/ Code of Conduct: http://python.org/psf/codeofconduct/
