On Tue, Sep 28, 2021 at 2:58 AM Eric Snow <ericsnowcurren...@gmail.com> 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?

When exactly does the freezing happen?

It's only a single data point, but when I'm tinkering with the stdlib
itself, I'm always running from the source tree. So option 3 seems
quite viable.

ChrisA
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