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. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Experts (#1, Sep 28 2021)
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