On Mon, Aug 14, 2017 at 9:27 AM, Julian Seward <jsew...@acm.org> wrote:
> On 13/08/17 03:40, Ehsan Akhgari wrote: > > As you may have heard by now, Chromium has started to switch their > Windows > > builds to use clang-cl instead of MSVC [1]. This has improved their > > Speedometer v2 benchmark score on x86 (but not on x86-64) by about 30% > > according to AWFY [2]. [..] > > Do we have any insight into why the Clang version is so much faster? > 30% strikes me as a large difference for two supposedly mature optimizing > compilers. And stranger still that it applies only for the 32-bit case. > So I'm curious to know what's changed. > AFAICT, the real change is about 19%: shortly before the jump to ~103, their score regressed from 86 to 78. I think using 86 as the baseline makes much more sense. 19% is obviously still a substantial improvement from a compiler change. _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
