[pypy-dev] Another benchmark where Pypy is much slower than CPython

[Alex Gaynor]

I've reproduced the performance on the latest default (on OS X, FWIW). I'm
starting to profile now.

Alex

PS: Your namedtuple usage is fine.


On Mon, Apr 28, 2014 at 8:43 PM, Robert Grosse <n210241048576 at gmail.com>wrote:

> Hi, while working on some MDP code, I discovered that it was several times
> as slow under Pypy as CPython. Attached is a benchmark demonstrating this.
>
> On my computer, the benchmark takes 70.3 seconds under CPython 2.7.3
> 64bit, but it takes 273.6 seconds under
> pypy-c-jit-71056-c8e3b8cbc843-win32, the latest version I could find.
>
> The code is not at all optimized, but I still found it strange that Pypy
> did so much worse. The code doesn't seem that complex, but perhaps the
> usage of nameduples is triggering pathological behavior from the JIT's
> point of view.
>
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>


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