Simulator on Xcode 10 became terribly slow

Question

Everything worked perfect on Xcode 9. But after updating to Xcode 10, Simulator started to get huge lags. Super simple animation is working on 2 fps and whole Mac OS is super sl

Answer 1

What worked for me was switching the values in Debug > Graphics Quality Override of the Simulator menu. Surprisingly, after setting to 'Low' from 'Device Default', lag was gone, and now any value works like a charm.