On Tue, Jan 16, 2018 at 10:02:12AM -0800, Ralph Giles wrote: > On Tue, Jan 16, 2018 at 7:51 AM, Jean-Yves Avenard <jyaven...@mozilla.com> > wrote: > > But I would be interested in knowing how long that same Lenovo P710 takes > > to compile *today*…. > > > > On my Lenovo P710 (2x2x6 core Xeon E5-2643 v4), Fedora 27 Linux > > debug -Og build with gcc: 12:34 > debug -Og build with clang: 12:55 > opt build with clang: 11:51 > > Interestingly, I can almost no longer get any benefits when using icecream, > > with 36 cores it saves 11s, with 52 cores it saves 50s only… > > > > Are you staturating all 52 cores during the buidls? Most of the increase in > build time is new Rust code, and icecream doesn't distribute Rust. So in > addition to some long compile times for final crates limiting the minimum > build time, icecream doesn't help much in the run-up either. This is why > I'm excited about the distributed build feature we're adding to sccache.
Distributed compilation of rust won't help unfortunately. That won't solve the fact that the long pole of rust compilation is a series of multiple long single-threaded processes that can't happen in parallel because each of them depends on the output of the previous one. Mike _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
