Is there a bug filed on this? I have exactly the same problem, 2x longer build time with version 3.9.0 on OS X 10.9.4.
I'll file one if needed. Allasso On 7/26/16, Gregory Szorc <g...@mozilla.com> wrote: > On Fri, Jul 22, 2016 at 5:29 AM, Paolo Amadini <paolo.02....@amadzone.org> > wrote: > >> I build mozilla-central on OS X 10.9.5 with the latest compatible >> version of XCode. >> >> $ clang --version >> Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn) >> Target: x86_64-apple-darwin13.4.0 >> Thread model: posix >> >> A clobber build with a plain .mozconfig file takes about 15 minutes. >> >> As a result of bug 1286204 (require at least clang 3.6) the build broke, >> and I had to install a newer version of clang: >> >> $ brew install llvm --with-clang >> >> $ /usr/local/opt/llvm/bin/clang --version >> clang version 3.8.1 (tags/RELEASE_381/final) >> Target: x86_64-apple-darwin13.4.0 >> Thread model: posix >> InstalledDir: /usr/local/opt/llvm/bin >> >> I've added these lines to .mozconfig: >> >> CC=/usr/local/opt/llvm/bin/clang >> CXX=/usr/local/opt/llvm/bin/clang++ >> >> The same revision takes about 26 minutes to build. >> >> I've tested on changeset feaaf1af1065, which is obviously from before >> the new requirement was introduced, with the .mozconfig being the only >> difference between the two builds. >> >> Any suggestions on how to avoid this build time regression? >> > > That's an intriguing result. Unfortunately, I can't reproduce because my > MacBook Pro has CPU overheating problems so I can't get reliable build > times from it. > > Does ccache come into play at all? > > If you run `time ./mach build`, does the user/sys CPU time have a drastic > increase as well? Are the numbers the same across invocations? (Perhaps > your machine overheats, like mine, and slows down after a few minutes of > building.) > _______________________________________________ dev-builds mailing list dev-builds@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-builds
