I haven't been able to synthesise a project where this reproduces that badly *yet*. Anyways I've filled https://bugs.swift.org/browse/SR-2461 with some more info in case it helps.
Thanks! 2016-08-22 21:47 GMT+01:00 Michael Gottesman <[email protected]>: > > On Aug 19, 2016, at 9:23 PM, Diego Sánchez via swift-users < > [email protected]> wrote: > > Hi all, > > We're suffering from very long Swift compilation times in our project. > Each file takes ~1 second to compile (-Onone), (measured with xctool -jobs > 1), which is hitting our development experience as we keep adding swift > code (~350 .swift files) :( > > I've gone through all the googling already and the > debug-time-function-bodies thing, but I didn't find any particular function > taking too long. However, I did notice: > a) Each file takes more or less the same amount of time to compile (~1 > second), even for very simple files. > b) Each "swift -frontend -c" command with the debug-time-function-bodies > dumps basically the same info for each file, which is around 1500 lines. > Most of the times are 0.0ms, and the total sum for a random choice gave me > 167.3 ms, far away from 1 second > > From a) and b) looks like the same heavy operation is being performed for > each file (type checking?) and that this heavy operation grows with the > size of the project. Would it be possible to do this upfront and not pay > for it in every file? Basically, if I have 3 classes in one file it will > take 1 second to compile them but if I do 1 file per class then it will be > 3 seconds :( > > I'd like some input to whether my assumption is correct and suggestions on > how to improve the compilation time, apart from splitting the code into > smaller frameworks. Can I expect improvements with Swift 3 or future > releases? (I tried migrating a small framework to Swift 3 and didn't see a > big difference) > > > Do you have a small example of this? Can you file a bug on bugs.swift.org? > > Then we can look at your specific example. > > > Cheers, > Diego > > > _______________________________________________ > swift-users mailing list > [email protected] > https://lists.swift.org/mailman/listinfo/swift-users > > >
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