Xcode 8 very slow Swift compiling

Question

Ever since Swift 3 and Xcode 8 my project compiles quite slowly. Every time I add so much as an empty line to a file, recompiling takes a full minute. When I check the outpu

Answer 1

I was able to greatly reduce my swift project compile times by avoiding the use the Nil-Coalescing Operator and string concatenation.

In otherwords where I had something like:

let x = "one" + object.nullableProperty ?? ""

I changed it to

let x = String(format: "one %@", object.nullableProperty ?? "")

My compile times have dropped drastically- from 20 minutes to 20 seconds.