Keep in mind that debug builds are probably at least an order of magnitude slower (or a large factor), whereas PGO is a very small factor. (After all, we do not PGO on Mac and it doesn't seem to be a problem.)
-David On Thursday, October 11, 2012 12:05:35 AM UTC-7, Tim Taubert wrote: > On 10/10/2012 11:57 PM, Justin Lebar wrote: > > > The main reason I'd want Linux PGO is for mobile. On desktop Linux, > > > most users (I expect) don't run our builds, so it's not a big deal if > > > they're some percent slower. (Unless distros commonly do PGO builds > > > of Firefox?) But we're not doing mobile Linux PGO builds (that I know > > > of), and I don't expect success with desktop PGO is much related to > > > success with mobile PGO. > > > > You may be right for release builds but that doesn't hold true for > > Nightly/Aurora/Beta users. I don't think it's a good idea to make those > > builds ~20% slower when of course we want and need more testers. Don't > > forget that testers on Linux do not only test Linux-only features but > > also features we have on every platform. > > > > Nobody likes running debug builds because they're slower so why would > > that be different for non-PGO builds? > > > > Also, I'm not sure how this affects Telemetry results. In terms of perf > > measurements we'd probably need to completely ignore everything from > > non-release builds as the results might differ heavily for some use > > cases. > > > > - Tim _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
