Shame! Shame! Shame!

It works awefully.
Compilation of Swift application is slow as hell on my top Macbook Pro 15 Retina Late 2013.
SourceKitService is taking 100% of CPU.
Storyboards and XIBs are not properly rendering.
No Swift refactoring though its already 2 years since Swift 1.0 release.

Apple, you make billions dollars every year. Spend a little of it to make developers happy.

Mixel007 about Xcode, v8.1