[pypy-dev] speed.pypy.org changes

Miquel Torres tobami at googlemail.com
Tue Apr 20 20:50:45 CEST 2010

Yeah, that can be seen in the fact that chaos's std dev for pypy-c is not as
large as for pypy-c-jit, in fact it is perfectly normal.

Btw. for easily spotting big std dev values maybe they should be highlighted
in red. What would a maximum reasonable value for std dev would be (compared
to total time)?

2010/4/20 Maciej Fijalkowski <fijall at gmail.com>

> Hi Carl, Hi Miquel.
> Cool job!
> On Tue, Apr 20, 2010 at 12:29 PM, Carl Friedrich Bolz <cfbolz at gmx.de>
> wrote:
> > Hi Miquel,
> >
> > On 04/20/2010 07:14 PM, Miquel Torres wrote:
> >> Changes you may notice are geared towards easing the identification of
> >> the cause of performance changes:
> >> - Std deviation was added to the DB, overview table and timeline
> >> tooltips. This way we can rule out fluctuations in the measuring as a
> >> cause for a big change. It has to be pointed out though, that this is
> >> only as useful as the way the std dev is being computed. (there you go,
> >> Carl Friedrich ;-)
> >
> > Yay, that's incredibly cool! Let's hope that eventually the graph
> > library supports errors too, so we can add them graphically. Anyway, I
> > already found some fun things about the benchmarks, so thanks a lot!
> > (e.g. the std dev of chaos is very large, which is not really a good
> thing)
> Of course it's large, because as mentioned above the way we compute it
> doesn't make sense. We have an average over consecutive runs which
> include warmup (less and less so over the course).
> Cheers,
> fijal
> _______________________________________________
> pypy-dev at codespeak.net
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