To my knowledge, no bug has been filed. Given we have multiple reports of this serious regression, a bug should definitely be filed.
On Wed, Jul 27, 2016 at 10:09 AM, allassopraise . <allassopra...@gmail.com> wrote: > 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.) > > >
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