> Profile-guided optimization did not help much, as might be expected, it > pushed about the same kind of optimization as the mtune/march combination.
> With gcc 4.1.3 i'm finding that profile guided optimization when trained > on pybench or regrtest does make a measurable difference (2-5% overall > time with 10-20% on some pybench tests). I haven't run benchmarks enough > times to be confident in my results yet, I'll report back with data once > I have it. I'm testing both pybench and regrtest as profiling training runs. It seems that profile guided optimization also offers some benefits on Windows (eg, http://mail.python.org/pipermail/python-dev/2007-May/072970.html), so it might be worth trying to coordinate such efforts between platforms (eg, a central document which holds results for all supported platforms sounds worthwhile, and maybe sharing the top-level script that generates the profile data, etc) Cheers, Mark _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
