[pypy-dev] (unexpectedly) bad performance of stackless and greenlet on PyPy

[Maciej Fijalkowski]

On Sun, Dec 30, 2012 at 2:24 PM, Denis Bilenko <denis.bilenko at gmail.com> wrote:
> Hi!
>
> I've micro-benchmarked stackless and greenlet module in PyPy and was
> quite surprised with the results. According to this benchmark
> stackless.channel is 100x times slower on PyPy (vs Stackless) and
> greenlet is 20x times slower on PyPy (vs CPython).
>
> https://gist.github.com/4412582
>
> Is this a bug in benchmark (or PyPy) or is it the expected current
> state of stackless features on PyPy?
>
> Cheers,
> Denis.
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This is at least partly expected because stackless and/or greenlets
disable the JIT. It probably shouldn't be 100x though. There is an
ongoing work to make this reason go away and then we can look what's
left.

Cheers,
fijal