[Python-Dev] Making "-j0" the default setting for the test suite?

[Guido van Rossum]

So why can't you just run "make test" if that's faster?

On Sun, Jan 28, 2018 at 8:30 PM, Nick Coghlan <ncoghlan at gmail.com> wrote:

> On my current system, "make test" runs in around 3 minutes, while
> "./python -m test" runs in around 16 minutes. And that's with "make
> test" actually running more tests (since it enables several of the
> "-u" options).
>
> The difference is that "make test" passes "-j0" and hence not only
> uses all the available cores in the machines, but will also run other
> tests while some tests are sleeping.
>
> How would folks feel about making "-j 0" the default in the test
> suite, and then adjusted the handling of "-j 1" to switch back to the
> current default single process mode?
>
> My rationale for that is to improve the default edit-test cycle in
> local development, while still providing a way to force single-process
> execution for failure investigation purposes.
>
> Cheers,
> Nick.
>
> --
> Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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-- 
--Guido van Rossum (python.org/~guido)
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