[Numpy-discussion] fresh performance hits: numpy.linalg.pinv >30% slowdown

[Warren Weckesser]

On 7/19/13, Yaroslav Halchenko <lists at onerussian.com> wrote:
> I have just added a few more benchmarks, and here they come
> http://www.onerussian.com/tmp/numpy-vbench/vb_vb_linalg.html#numpy-linalg-pinv-a-float32
> it seems to be very recent so my only check based on 10 commits
> didn't pick it up yet so they are not present in the summary table.
>
> could well be related to 80% faster det()? ;)
>
> norm was hit as well a bit earlier,


Well, this is embarrassing: https://github.com/numpy/numpy/pull/3539

Thanks for benchmarks!  I'm now an even bigger fan. :)

Warren


 might well be within these commits:
> https://github.com/numpy/numpy/compare/24a0aa5...29dcc54
> I will rerun now benchmarking for the rest of commits (was running last
> in the day iirc)
>
> Cheers,
>
> On Tue, 16 Jul 2013, Yaroslav Halchenko wrote:
>
>> and to put so far reported findings into some kind of automated form,
>> please welcome
>
>> http://www.onerussian.com/tmp/numpy-vbench/#benchmarks-performance-analysis
>
>> This is based on a simple 1-way anova of last 10 commits and some point
>> in the past where 10 other commits had smallest timing and were
>> significantly
>> different from the last 10 commits.
>
>> "Possible recent" is probably too noisy and not sure if useful -- it
>> should
>> point to a closest in time (to the latest commits) diff where a
>> significant excursion from current performance was detected.  So per se it
>> has
>> nothing to do with the initial detected performance hit, but in some
>> cases
>> seems still to reasonably locate commits hitting on performance.
>
>> Enjoy,
> --
> Yaroslav O. Halchenko, Ph.D.
> http://neuro.debian.net http://www.pymvpa.org http://www.fail2ban.org
> Senior Research Associate,     Psychological and Brain Sciences Dept.
> Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
> Phone: +1 (603) 646-9834                       Fax: +1 (603) 646-1419
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