[pypy-dev] Pypy is slower than Python

[Alex Gaynor]

I don't think this is a GC case. I think this is a case of loops with only
a few iterations aren't fast enough.

Alex


On Tue, Apr 30, 2013 at 3:13 PM, Maciej Fijalkowski <fijall at gmail.com>wrote:

> This is a kind of example where our GC card marking does not quite
> work. I think the improve-rdict branch should improve this kind of
> code quite a bit (but I still have to finish it)
>
> On Tue, Apr 30, 2013 at 6:51 PM, Armin Rigo <arigo at tunes.org> wrote:
> > Hi,
> >
> > On Tue, Apr 30, 2013 at 5:26 AM, cat street <gamcat at gmail.com> wrote:
> >> You can test this code:
> >> (...)
> >
> > For no good reason it seems that on this example CPython is quite a
> > bit faster on Linux64 than on Linux32.  PyPy is also a bit faster on
> > Linux64 but not by such a large margin.  In my tests (PyPy vs CPython)
> > it ends up the same on Linux32, and on Linux64 PyPy is a bit slower
> > (20%?).  I think it's good enough given the type of code (completely
> > unoptimizable as far as I can tell, unless we go for "we can kill the
> > whole loop in this benchmark", which is usually a bit pointless in
> > real code).  If others want to look in detail at JIT traces, feel free
> > to.
> >
> >
> > A bientôt,
> >
> > Armin.
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