Sure! Thanks for reminding me. I'll follow up on that, test, and get back to you.
Ben On Thu, Dec 1, 2016 at 2:48 PM, Mark Lacey <mark_la...@apple.com> wrote: > > On Dec 1, 2016, at 3:13 PM, Ben Asher via swift-dev <swift-dev@swift.org> > wrote: > > Just running a quick trial before and after I made this change in our > project, we were previously seeing builds of our main target that took just > under 13min. With this hack, a clean debug build takes about 4.5min. > > > You may find that recent snapshot builds from swift.org help with your > build times even without enabling -Owholemodule. The redundant type > checking of synthesized accessors which we talked about a month or two > should now be fixed on master, and it would be great to verify that’s the > case with your code and to get an idea of how much it improves your build > times. > > Mark > > > Ben > > On Thu, Dec 1, 2016 at 1:33 PM, Ben Asher <benashe...@gmail.com> wrote: > >> Okay I think that worked! And just to clarify, you meant set >> SWIFT_OPTIMIZATION_LEVEL = -Owholemodule and OTHER_SWIFT_FLAGS = -Onone ? >> >> I'll file a radar this afternoon with some details and DM you the number. >> >> Thanks again! >> >> Ben >> >> On Thu, Dec 1, 2016 at 1:10 PM, Jordan Rose <jordan_r...@apple.com> w >> rote: >> >>> Xcode needs to know that you're building in WMO mode, so rather than >>> putting -whole-module-optimization in your "Other Swift Flags", put -Onone >>> there. It's an ugly hack but it should work in the near term. >>> >>> We do want to work to make this drastic speed difference go away, so if >>> you're able we (at Apple) would love to have a source drop of your Swift 3 >>> project, for additional data on where the problems are. Mind filing a Radar? >>> >>> Best, >>> Jordan >>> >>> >>> > On Dec 1, 2016, at 11:51, Ben Asher via swift-dev <swift-dev@swift.org> >>> wrote: >>> > >>> > Hello! Someone recently tipped me off to using >>> -whole-module-optimization flag with -Onone for use during debug builds to >>> speed up compile times. In our project, the speedup feels quite dramatic, >>> but when it gets to the linking step (after compiling both Swift and Obj-C >>> in the project) it fails because ld can't find the individual object files >>> that normally get emitted during the debug-type build presumably because >>> -whole-module-optimization only emits one (and this isn't a normal >>> "-Owholemodule"-type build which works fine). >>> > >>> > I can't seem to reproduce this outside of Xcode, but I was curious if >>> anyone has tried this and knows of a workaround to get >>> -whole-module-optimization to work with -Onone in Xcode? >>> > >>> > I'm currently using Xcode 8.1 (App Store build) and Swift 3 on macOS >>> Sierra. >>> > >>> > Thanks! >>> > >>> > Ben >>> > _______________________________________________ >>> > swift-dev mailing list >>> > swift-dev@swift.org >>> > https://lists.swift.org/mailman/listinfo/swift-dev >>> >>> >> >> >> -- >> Ben >> > > > > -- > Ben > _______________________________________________ > swift-dev mailing list > swift-dev@swift.org > https://lists.swift.org/mailman/listinfo/swift-dev > > > -- Ben
_______________________________________________ swift-dev mailing list swift-dev@swift.org https://lists.swift.org/mailman/listinfo/swift-dev
