DerivedSourcesAllInOne.cpp is the biggest bottleneck on Linux too. Even when running make with a high -j value, one would end up in the situation where one core is pegged for more than a minutes while all the others sit idle.
On Tue, Dec 1, 2009 at 10:57 AM, Lei Zhang <thes...@google.com> wrote: > DerivedSourcesAllInOne.cpp is the biggest bottleneck on Linux too. > Even when running make with a high -j value, one would end up in the > situation where one core is pegged for more than a minutes while all > the others sit idle. > > On Tue, Dec 1, 2009 at 9:32 AM, Jens Alfke <s...@chromium.org> wrote: >> On Mac* the WebCore Xcode project has a separate build target >> "webcore_bindings" that contains DerivedSourcesAllInOne.cpp and a >> handful of other files. This setup is really slowing down the build >> process on my Mac Pro, because DerivedSourcesAllInOne takes much >> longer to compile than any of the other sources in that target (since >> it #includes about 100 .cpp files), so there's a long period where one >> of the 8 cores is compiling that one file while the others are >> twiddling their thumbs. >> >> (I notice this especially because I've been working on V8 bindings >> stuff lately, so everything I touch tends to force that target to >> rebuild.) >> >> This could be improved either by >> a- merging this target in with the main WebCore target (didn't it use >> to be that way?) >> b- adding more files to this target to give the other cores something >> to do >> c- breaking up DerivedSourcesAllInOne into several pieces to compile >> simultaneously >> >> Anyone have any thoughts about this? (Option c seems attractively easy >> to do...) >> >> —Jens >> >> *maybe this applies to other platforms too, since the basic build >> structure comes from the shared .gyp file? >> >> -- >> Chromium Developers mailing list: chromium-dev@googlegroups.com >> View archives, change email options, or unsubscribe: >> http://groups.google.com/group/chromium-dev >> > -- Chromium Developers mailing list: chromium-dev@googlegroups.com View archives, change email options, or unsubscribe: http://groups.google.com/group/chromium-dev
