Hi Greg and others,

I was just about to raise the issue of performance regression from this
change. If we are aiming this at the 49 release, I would like for us to
improve the situation described in bug 1259923, a 15% performance
regression across all Talos tests covering Windows platforms, which Joel
brought to my attention yesterday.  I don't think we can accept that if it
means a large noticeable slowdown in performance for Windows users in the
release population.   (Even though we really, really want to improve the
toolchain and build time for developers and our own infrastructure.)

Can we put some engineering resources into investigating the test results
and mitigating the perf regression?   15% worse across all Windows tests
should probably block the release. We don't have hard and fast criteria for
what would be an acceptable perf hit.  I think the platform (and probably
product team) should discuss that.

Thanks,

Liz


On Tue, May 31, 2016 at 4:22 PM, Gregory Szorc <g...@mozilla.com> wrote:

> Heads up: we'll soon be dropping support for building mozilla-central with
> VS2013. Bug 1186064 tracks and the patch has already received r+.
>
> I'm going to wait a few days before landing because this could be
> disruptive and I want to at least give a heads up before I create a fire.
> Please install VS2015 in the next 48 hours to avoid a surprise the next
> time you pull.
>
> (We've previously recommended everyone install VS2015, so this
> announcement should come as no surprise.)
>
> _______________________________________________
> firefox-dev mailing list
> firefox-...@mozilla.org
> https://mail.mozilla.org/listinfo/firefox-dev
>
>


-- 
----
Liz Henry (:lizzard)
Firefox Release Manager
lhe...@mozilla.com
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