That is fantastic, lots of nice wins! On Tue, Aug 21, 2018 at 6:02 PM, David Major <dma...@mozilla.com> wrote:
> A quick update about performance: ThinLTO and PGO were enabled for our > clang-cl builds over the last few weeks. These optimizations have > cancelled the previous regressions and brought clang well ahead of > MSVC: https://treeherder.mozilla.org/perf.html#/compare? > originalProject=try&originalRevision=2adb3cb404ad& > newProject=try&newRevision=5336df94a9ce&framework=1 > To call out a few: Speedometer scores increased by 6% on Win64 and 12% > on Win32, and the most dramatic improvement was displaylist_mutate at > 27%! > > As far as I'm aware, no blockers have come up and clang-cl is still > looking good for the 63 train. > > On Tue, Jul 10, 2018 at 4:29 PM David Major <dma...@mozilla.com> wrote: > > > > Bug 1443590 is switching our official Windows builds to use clang-cl > > as the compiler. > > > > Please keep an eye out for regressions and file a blocking bug for > > anything that might be fallout from this change. I'm especially > > interested in hearing about the quality of the debugging experience. > > > > It's possible that the patch may bounce and we'll go back and forth to > > MSVC for a while. You can check your build's compiler at > > `about:buildconfig`. Treeherder is running an additional set of MSVC > > jobs on mozilla-central to make sure we can fall back to a green MSVC > > if needed. > > > > Watch for more toolchain changes to come. The next steps after this > > will be to switch to lld-link and enable ThinLTO. That will open the > > door to a cross-language LTO that could inline calls between Rust and > > C++. In the longer term we can look into cross-compiling from Linux. > > > > But for now, shipping our most-used platform with an open-source > > compiler is a huge milestone in and of itself. Big thanks to everyone > > who has contributed to this effort on the Mozilla side, and also big > > thanks to the developers of LLVM and Chromium who helped make clang on > > Windows a realistic possibility. > _______________________________________________ > firefox-dev mailing list > firefox-...@mozilla.org > https://mail.mozilla.org/listinfo/firefox-dev > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
