Compile Time Incredibly Slow

Question

My project consists of ~350 Swift files and ~40 cocoa pod dependencies.

As soon as the entire project was migrated to Swift 3, build times have been <

Answer 1

Also string concatenation seems to be incredible slow in Swift3/XCode8:

item.text = item.text + " " + pickerText + " " + (attribute?.Prefix ?? "") + inputText + (attribute?.Suffix ?? "")

~ took 8-10 seconds to compile

item.text = "\(item.text) \(pickerText) \(attribute?.Prefix ?? "")\(inputText)\(attribute?.Suffix ?? "")"

~ took 1,6 seconds to compile

item.text = [item.text, " ", pickerText, " ", (attribute?.Prefix ?? ""), inputText, (attribute?.Suffix ?? "")].joined();

~ took 0,001 second to compile