Slow autocomplete in Xcode 8

Question

I recently got a 2016 nTB MBP. I started Obj-C in Xcode 8 a few days ago.

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.

Is this normal or it should be smooth?

I removed it with AppCleaner and reinstalled it but it's just the same.

Answer 1

Tame the beast with:

Xcode | Preferences | General > Uncheck "Show live issues"

BTW None of the answers in the "Possible duplicate" above fixed this for me.