I\'ve installed Xcode 8.0 and converted Swift 2.2 to 3.0 (that process also took a lot of time, I just left my Mac running all night). I have not a big project (about 20 fil
I had similar problem and followed this guide to debug : http://irace.me/swift-profiling
My problem was i had nil coalescing operator in some strings for example:
let name = "\(someString ?? "")"
and four methods with this were causing 2 min additional building time.