In the engineering meeting this afternoon we refined the scenarios that
we are mostly concerned about improving for Preview. They are listed at
the top of http://wiki.osafoundation.org/Projects/PerformanceProject. We
also set new acceptable targets for these scenarios - and we really do
think these would become blockers if we don't reach them.

We noted two additional tests we want to have:

* Quick entry in Dashboard with 3k
* Triage in Dashboard with 3k

Once we reach acceptable values on all platforms for a given scenario,
we can stop work on that scenario and concentrate on improving the others.

Of course, we still care about regressions, and based on feedback may
pursue other performance cases as well.


It was also requested that these scenarios be moved to the top of the
performance reports on Tinderbox, and that the coloring be changed as
follows:

* Entries in the absolute values columns will get green background if
the value is under ideal time, orange if under acceptable time, and red
otherwise. Note: I also use std.dev such that I won't change the color
for the better unless it is under the target-std.dev.

* Entries in the delta columns will get colored borders. The rules
haven't changed for these: green means it got better, orange slightly
slower, and red much slower.

If you have any feedback regarding the scenarios, targets or reports,
please let us know. Oh, we are working on getting a more representative
data set about real world usage.

PS. I have some feedback regarding the new coloring scheme. I don't like
the switch to make absolute values have colored background and deltas
have borders. The new way of course makes it easy to see at a glance
what the current situation is, but I am more interested in seeing the
changes at a glance.

-- 
  Heikki Toivonen


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