this post was submitted on 26 Mar 2025
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[–] [email protected] 141 points 3 days ago (29 children)

all programs are single threaded unless otherwise specified.

[–] [email protected] 23 points 3 days ago (18 children)

Does Python have the ability to specify loops that should be executed in parallel, as e.g. Matlab uses parfor instead of for?

[–] [email protected] 51 points 3 days ago (10 children)

python has way too many ways to do that. asyncio, future, thread, multiprocessing...

[–] WolfLink 39 points 3 days ago (1 children)

Of the ways you listed the only one that will actually take advantage of a multi core CPU is multiprocessing

[–] [email protected] 9 points 3 days ago (1 children)

yup, that's true. most meaningful tasks are io-bound so "parallel" basically qualifies as "whatever allows multiple threads of execution to keep going". if you're doing numbercrunching in pythen without a proper library like pandas, that can parallelize your calculations, you're doing it wrong.

[–] WolfLink 7 points 2 days ago* (last edited 2 days ago) (1 children)

I’ve used multiprocessing to squeeze more performance out of numpy and scipy. But yeah, resorting to multiprocessing is a sign that you should be dropping into something like Rust or a C variant.

[–] [email protected] 1 points 2 days ago

Most numpy array functions already utilize multiple cores, because they're optimized and written in C

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