This is great progress! I had hope that something like this would also include the 'build binaries' DAG. It might make it slightly slower but it should still be very fast and lessen the cognitive load. I was under the impression that 'build binaries' at some point was a single DAG but it doesn't seem to be the case anymore (I see make entering/exiting directories now)?
It would be nice if we got to a state where we had a 'build faster' like target that supported all the most frequently modified extensions all-in-one (say cpp/h/js/jsm/idl/css/xul). On Mon, Oct 5, 2015 at 12:30 PM, Gregory Szorc <g...@mozilla.com> wrote: > Basically a set of build actions related to frontend development and known > by moz.build files are assembled in a single make file that contains a > single DAG and doesn't need to recurse into directories. See > python/mozbuild/mozbuild/backend/fastermake.py and <objdir>/faster/Makefile > for the low-level details. > > On Fri, Oct 2, 2015 at 12:18 PM, Justin Dolske <dol...@mozilla.com> wrote: > > > 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 > >> > > > > > > _______________________________________________ > > 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 > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
