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

[Laurent Vaucher]

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 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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