On Tue, Apr 05, 2016 at 09:02:09PM +0100, David Burns wrote: > Below is a highlight of all work the build peers have done in the last 2 > weeks as part of their work to modernise the build infrastructure. > > Since the last report[1] a large number of improvements have landed in > Mozilla Central. > > The build system now lazily installs test files. Before, the build copied > tens of thousands of test and support files. This could take dozens of > seconds on Windows or machines with slow I/O. Now, the build system defers > installing test files until they are needed there (e.g. when running tests > or creating test packages). Furthermore, only the test files relevant to > the action performed are installed. Mach commands running tests should be > significantly faster, as they no longer examine the state of tens of > thousands of files on every invocation. > > After upgrading build machines to use VS2015, we have seen a decrease in > build times[2] for PGO on Windows by around 100 minutes. This brings PGO > times on Windows in line with that of PGO(Strictly speaking this is LTO) > times on Linux.
Just a nit: strictly speaking Windows builds do PGO+LTO, Linux builds do PGO, but not LTO. Mike _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
