[pypy-dev] speed.pypy.org changes

Miquel Torres tobami at googlemail.com
Tue Apr 20 19:14:23 CEST 2010

Hi all,

there have been pretty big changes under the hood of (they were implemented
for some time now, but I didn't have time to migrate the site) in order to
accomodate a couple of new features. One of them doesn't affect pypy for the
moment, which is allowing revisions to be actually strings (it allows to
change to git, for example), and consecuently basing revision ordering on
date, rather than on rev number.

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 ;-)
- SVN integration: Under the overview table, the commit logs starting after
the last tested revision are shown. It should help quickly identify which
commits should take the blame for a regression.

I hope you find it useful!
If anyone thinks about any way to improve on those two features please say

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