[pypy-dev] [Repost] PyPy 1.8 50% slower than PyPy 1.7 on my test case

[Maciej Fijalkowski]

On Fri, Feb 17, 2012 at 8:23 PM, Laurent Vaucher
<laurentvaucher at gmail.com> wrote:
>
> Sorry to repost, but does anyone have an idea about what I could do to track
> down the source of the slowdown? Should I run with some trace to try to
> compare how different parts behave? How could I do that?
>
> Thanks,
> Laurent.

Hi laurent.

Good starting points:

* run stuff with cProfile and compare
* run stuff with valgrind and compare
* compare traces
* run PYPYLOG=log pypy <your program> and then analyze output using
pypy/tool/logparser.py

I'm sorry we did not get back to you, but we're quite busy.

Thanks!
fijal

>
> Hi and first of all, thanks for that great project.
> Now to my "problem". I'm doing some puzzle-solving, constraint processing
> with Python and on my particular program, PyPy 1.8 showed a 50% increase in
> running time over PyPy 1.7. I'm not doing anything fancy (no numpy,
> itertools, etc.).
>
> The program is here: https://github.com/slowfrog/hexiom
> To reproduce:
> - fetch hexiom2.py and level36.txt from github
> - run 'pypy hexiom2.py -sfirst level36.txt'
> On my machine (Windows 7) the timings are the following:
>
> Python 2.6.5/Windows 32
> 3m35s
>
> Python 2.7.1 (930f0bc4125a, Nov 27 2011, 11:58:57)
> [PyPy 1.7.0 with MSC v.1500 32 bit]
> 31s
>
> Python 2.7.2 (0e28b379d8b3, Feb 09 2012, 18:31:47)
> [PyPy 1.8.0 with MSC v.1500 32 bit]
> 48s
>
> I'm using the default options.
> Do you have any idea what could be causing that?
> Thanks,
> Laurent.
>
>
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