While I agree we should drop non-SSE (and have started a conversation to drop non-SSE2 as well :), the comparison to dropping 10.6-10.8 users is somewhat unfair. Those users can upgrade 10.9 easier than the non-SSE users can buy a new computer. — - Milan
> On May 6, 2016, at 12:22 , Gregory Szorc <g...@mozilla.com> wrote: > > On Fri, May 6, 2016 at 7:10 AM, Mike Hoye <mh...@mozilla.com > <mailto:mh...@mozilla.com>> wrote: > >> On 2016-05-06 12:26 AM, Gregory Szorc wrote: >> >>> FWIW, the crashes we've seen so far are from incorrectly emitted movss >>> instructions. This instruction is part of the original SSE instruction >>> set, >>> which was initially unveiled by Intel on the Pentium 3 in 1999 and later >>> by >>> AMD on the Duron and Athlon XP in 2000-2001. I'm not sure why we still >>> need >>> Firefox to run on processors manufactured in the 90s. >>> >> Per an IRC conversation with chutten, Firefox users on CPUs that do not >> support SSE are 0.015% of our user base. (compared to 0.4% for no-SSE2). A >> third of those are on otherwise-unsupported configurations (pre-SP3 XP, >> etc), this work provides continuity of support to 0.01% of our users. >> > > This population (0.015%) is ~100x smaller than the OS X 10.6-10.8 users we > just decided to drop (going by bsmedberg's quote of 1.2% in the OS X > deprecation thread). Looking at the numbers alone, I can't see how we > wouldn't arrive at the conclusion to require SSE. Beyond the numbers, the > modern web must be a horrible experience on ancient processors and machines > not supporting SSE. I'm not sure what value continuing to provide Firefox > updates to this population will add. > > Reverting to VS2013 will have an unplanned negative impact on developers > and automation. Reverting to VS2013 then deciding a short time after that > we can use VS2015/SSE after all will have even more negative impact. It is > desirable to avoid both these things. Therefore *I'm going to not move > forward with reverting aurora and central to VS2013 unless someone says > otherwise*. I have cancelled the aurora uplift requests in bug 1270664 > until a decision is made. > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org <mailto:dev-platform@lists.mozilla.org> > https://lists.mozilla.org/listinfo/dev-platform > <https://lists.mozilla.org/listinfo/dev-platform> _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
