----- Original Message -----
> From: "Ehsan Akhgari" <ehsan.akhg...@gmail.com>
> To: "Bas Schouten" <bschou...@mozilla.com>, "Gijs Kruitbosch"
> <gijskruitbo...@gmail.com>
> Cc: "Gavin Sharp" <ga...@gavinsharp.com>, dev-tech-...@lists.mozilla.org,
> "mozilla.dev.platform group"
> <dev-platform@lists.mozilla.org>, "release-drivers"
> <release-driv...@mozilla.org>
> Sent: Thursday, May 22, 2014 12:56:26 PM
> Subject: Re: OMTC on Windows
>
> On 2014-05-22, 5:18 AM, Bas Schouten wrote:
> > The focus should, in my opinion be, what has actually been affected by this
> > in a way that it has a strong, negative impact on user experience.
> > Considering the scope of this change I am certain those things exist and
> > they will need to be fixed. Perhaps the CART regression -is- a sign of
> > some real unacceptable perceived performance, I'm not ruling that out, but
> > we have not identified an interaction which significantly regressed. This
> > is all extremely hardware dependent though (i.e. on most of my machines
> > TART and CART both improve with OMTC), so if someone -has- seen this cause
> > a significant performance regression in some sort of interaction, do let
> > us know.
>
> Have you tried to test those interactions on the same Talos machines
> that the CART regressions happened on? I think that would definitively
> answer the question of whether these regressions affect an interaction
> we care about.
>
> (Also, out of curiosity, what is the list of those interactions?)
>
> Cheers,
> Ehsan
We have, but it should be noted CART does some special things I believe to draw
'as fast as possible', so even a 40% regression, could still be 'fast enough'
and we still wouldn't see an affect we cared about.
As I said, I didn't look at CART specifically but more at TART. One interaction
that was particularly bad there in the numbers, was 'tab-close' that looked
fine to me on the machines I looked at, but it probably deserves some specific
attention on some other, slower machines.
Thanks!
Bas
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