Re: [hpy-dev] Re: Re: [Numpy-discussion] Better compatibility of the Python scientific/data stack with fast Python interpreters

Hi Pierre,

so one thing you can definitely do without deep knowledge is bisect the 
performance degradation. We have nightly builds here: 
https://buildbot.pypy.org/nightly/

It's a little bit tedious work, but if it's such a clear slowdown, 
finding out what broke this is useful.

For more involved dev work, maybe it makes sense for us to set up a 
video call and brainstorm a bit what you would be interested in and 
would make strategic sense. I'm a bit busy with teaching still, but we 
can probably find a slot. Send me a private mail if you want to do that?

Cheers,

CF

On 2025-06-04 01:44, PIERRE AUGIER wrote:
> 
> Hello,
> 
> I'd like to try to work on this performance issue https://github.com/
> pypy/pypy/issues/5277. It is about the fact that allocations of
> types defined with HPy are very slow compared to the CPython
> counterpart (typically 7 times slower).
> 
> I think it is a key problem when considering a potential revival of
> the HPy project with new funding (which would help PyPy).
> 
> Some data in old messages seem to indicate that it is at least
> partly a regression: it seems that PyPy was in Sept. 2022 only
> something like 2 times slower.
> 
> I guess fixing issue #5277 is very technical and I realize that I
> might not be able to be efficient on this subject. However, I'm
> motivated to learn and I can spend a bit of time and energy on this
> subject.
> 
> So I'm asking for some kind of mentoring. Matti and Carl Friedrich,
> I would need your point of view on this project. Is it even possible
> to try to do something about #5277 for someone who has only a
> superficial knowledge of PyPy internals?
> 
> Then, where and how to start? I guess the first thing to do would be
> to try to understand why PyPy is so slow by profiling (?), studying
> traces (?) and/or studying PyPy code, in particular the HPy
> implementation?
> 
> I'd like to be clear that it is just a proposition and that I
> realize that I'm asking for your time. If you think that it does not
> make sense to try to work on this direction (#5277, HPy in general),
> please tell me!
> 
> Pierre

_______________________________________________
pypy-dev mailing list -- [email protected]
To unsubscribe send an email to [email protected]
https://mail.python.org/mailman3//lists/pypy-dev.python.org
Member address: [email protected]