[pypy-dev] cpyext performance

Maciej Fijalkowski fijall at gmail.com
Fri Jul 6 14:24:49 CEST 2012


i might think bad about those benchmarks representing python workloads,
howecer they are very likely good for cpyext. good job.

On Thursday, July 5, 2012, Stefan Behnel <stefan_ml at behnel.de> wrote:
> Stefan Behnel, 05.07.2012 14:35:
>> http://cython.org/callgrind-pypy-nbody.png
> I've set up a job on our build server to run a couple of (simple)
> benchmarks comparing Cython's current performance under CPython and PyPy.
> Note that these are C-API intensive benchmarks by design (they are
> from Python code), even though they use static type annotations for
> optimisation. Despite of what you might think about these benchmarks in
> general, I think they are quite suitable for cpyext.
> The latest results are here:
> They currently run 100-200x slower through cpyext than in CPython 2.7. The
> build job always uses the latest nightly build of PyPy, so any changes in
> Cython or PyPy will usually show up within the next 24 hours.
> The build job also archives the generated .c files (and the original
> sources, including the HTML version). If anyone wants to play with them,
> you can just download the C file, build it with distutils, import it and
> then call its "main(number_of_iterations)" function. The C code works in
> both PyPy and CPython, although the actual C-API calls differ somewhat
> between the two.
> Stefan
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