Core :: Build Config On Thu, Jul 28, 2016 at 10:55 AM, allassopraise . <[email protected]> wrote:
> I'm happy to do that, can you recommend the proper product and > component to file it under? > > On 7/28/16, Gregory Szorc <[email protected]> wrote: > > 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 . < > [email protected]> > > 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 <[email protected]> wrote: > >> > On Fri, Jul 22, 2016 at 5:29 AM, Paolo Amadini < > >> [email protected]> > >> > 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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