Nice! Out of curiosity, how does "faster" work? Does it just ignore build targets/directories that involve native code?
FWIW, I benchmarked various no-changes builds with yesterday's m-c, on my low-end Surface Pro 3 (i3, 4GB)... mach build: 7:38 mach build browser: 0:43 mach build toolkit: 1:42 mach build faster: 0:22 Big wins! Justin On Thu, Oct 1, 2015 at 5:23 PM, Mike Hommey <m...@glandium.org> wrote: > Hi, > > I recently landed a new build backend that, if you opt-in to running it, > will make your non-C++ changes to Firefox more readily available in > local builds. > > After you built Firefox normally once, and assuming you only changed > non-C++ code, you can now use the following command for a faster > incremental build: > ./mach build faster > > Now, since this is fresh out of the oven, there are a few things to > know: > - it doesn't handle removing files > - it doesn't handle files that would end up outside of dist/bin > - it doesn't handle a few things like the files from the default profile > - it currently only works for desktop Firefox > > Obviously, this is not an end state, so things will improve in the > future, but it should work well enough for most day-to-day work for > desktop Firefox, thus this message. > > On my machine, `mach build faster` completes in about 4 seconds for an > incremental build. This should get even faster very soon. > > Additionally, while requiring some manual steps (which bug 1207888 and > bug 1207890 will help with), it is also possible to use this to build > desktop Firefox without actually building any C++. Here is how that > goes: > - Run `./mach configure` with a mozconfig containing: > ac_add_options --disable-compile-environment > - Download and unpack a nightly > - Use `./mach python toolkit/mozapps/installer/unpack.py <path>`, where > <path> is the nightly's firefox/ directory. > - Move that fully unpacked nightly to $objdir/dist/bin (for mac, that > involves more fiddling, because dist/bin is a somewhat flattened > version of the .app directory) > - Ensure the files in $objdir/dist/bin are older than the source files. > - Run `./mach build faster`. > - On mac, you will need to run something like (untested) > ./mach build browser/app/repackage > > After that $objdir/dist/bin should contain a bastardized Firefox, with > xul, js, etc. coming from the source tree, and the remainder still being > there from the original nightly. > > `mach run` should work with that. > > Cheers, > > Mike > _______________________________________________ > 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
