title: Slow autocomplete in Xcode 8
body: <p>I recently got a 2016 nTB MBP. I started Obj-C in Xcode 8 a few days ago.</p>
  
  <p>What I noticed, that autocomplete is really useful but it's incredibly slow. Even inside an extremely simple class (fractions, just for practice), the delay is very annoying when typing.</p>
  
  <p>Is this normal or it should be smooth?</p>
  
  <p>I removed it with AppCleaner and reinstalled it but it's just the same.</p>