[issue32039] timeit documentation should describe caveats

[Barry A. Warsaw]

Barry A. Warsaw <barry at python.org> added the comment:

On Nov 15, 2017, at 17:00, Serhiy Storchaka <report at bugs.python.org> wrote:
> 
> +1 to all said by Raymond. But this is rather the matter of a special article or blog post than a note in the documentation.

Maybe a HOWTO on performance testing and analysis?  We already have one on instrumenting with DTRACE/SystemTap, and we could point the timeit docs to this new HOWTO.

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<https://bugs.python.org/issue32039>
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