Is it just me or Xcode 6 (6.0.1) with Swift seems to be super slow when you type your code, especially with autocompletion?
A normal Objective-C cla
Autocomplete is broken since Xcode 4. Until Apple decides to fix this 2 years old bug, the only solution, unfortunately, is to turn code completion OFF on XCode's preferences (first option of the pic below).
You can continue to enjoy completion manually by typing CTRL space or ESC when you need it.
This is the only solution that works every time for 100% of the cases.

Another thing I have discovered recently is: if you use plugins on Xcode, don't. Remove them all. They make the problem worse.