On Dec 18, 2014, at 6:51, Warner Losh <imp_at_bsdimp.com> wrote: > With the recent parallelism work, the is true. It might save a couple percent > off the build time. Before those changes, though, disabling all non target > arches saved about 10% of the buildworld time. I’m curious. How much is 10% in terms of minutes and with what -j value? > Creating a hack to do this is easy (which is how I measured it). But Dimitry > is right that creating a robust solution is hard. Even harder if you want it > to be completely clean. It didn’t seem incredibly hard — it just required a bit more “generated files” in clang AFAICT. I’ll hang ten until clang35 is in so I can re-asses what’s going on with building it. > I tend to agree. IMHO, supporting the work going on to bring the > meta-mode stuff will pay far higher dividends than optimizing this > corner of the build. True… probably will!
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