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Fri Mar 3 02:27:08 EST 2017 · https://mail.python.org/pipermail/python-dev/2017-March/147527.html

On 2 March 2017 at 07:00, Victor Stinner <victor.stinner at gmail.com> wrote:

> Hi,
>
> Your document doesn't explain how you configured the host to run
> benchmarks. Maybe you didn't tune Linux or anything else? Be careful
> with modern hardware which can make funny (or not) surprises.

Victor, do you know if you or anyone else has compared the RHEL/CentOS 7.x
binaries (Python 2.7.5 + patches, built with GCC 4.8.x) with the Fedora 25
binaries (Python 2.7.13 + patches, built with GCC 6.3.x)?

I know you've been using perf to look for differences between *Python*
major versions, but this would be more about using Python's benchmark suite
to investigate the performance of *gcc*, since it appears that may be the
culprit here.

Cheers,
Nick.

-- 
Nick Coghlan   |   ncoghlan at gmail.com   |   Brisbane, Australia
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[Python-Dev] Help requested with Python 2.7 performance regression