Message 259942 - Python tracker

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Author	yselivanov
Recipients	mark.dickinson, pitrou, serhiy.storchaka, vstinner, yselivanov
Date	2016-02-09.16:03:37
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1455033818.34.0.977265262501.issue26289@psf.upfronthosting.co.za>
In-reply-to

Content
> Is it worth to move the optimization inside l_divmod? Will this speed up or slow down other operations that use l_divmod? Attaching a new patch -- fast_divmod.patch It combines patches for this issue and issue #26315. Individual timeit benchmarks work as fast, but op becomes faster: -m timeit -s "x=223" "x2;x-2;x2;x-3;x3;x-3;x4.5;x**-4.5" with patch: 1.2usec without: 1.5usec

> Is it worth to move the optimization inside l_divmod? Will this speed up or slow down other operations that use l_divmod?

Attaching a new patch -- fast_divmod.patch

It combines patches for this issue and issue #26315.

Individual timeit benchmarks work as fast, but ** op becomes faster:

-m timeit -s "x=223" "x**2;x**-2;x**2;x**-3;x**3;x**-3;x**4.5;x**-4.5"
with patch: 1.2usec
without: 1.5usec

History
Date	User	Action	Args
2016-02-09 16:03:38	yselivanov	set	recipients: + yselivanov, mark.dickinson, pitrou, vstinner, serhiy.storchaka
2016-02-09 16:03:38	yselivanov	set	messageid: <1455033818.34.0.977265262501.issue26289@psf.upfronthosting.co.za>
2016-02-09 16:03:38	yselivanov	link	issue26289 messages
2016-02-09 16:03:38	yselivanov	create