Xcode Simulator animations extremely slow when played in editor
If you press command+T it triggers the 'Slow animations' feature. I didn't noticed this setting until now. Doh!
In Simulator menu, go to Debug > Slow Animations , and uncheck this option or simply do:
⌘ + T
XCODE 9 BUG. This is officially confirmed to be an issue with Xcode 9.0 and its iOS 11 simulator — it affects any OpenGL-using application.
See: https://github.com/mapbox/mapbox-gl-native/issues/9959
Also: https://twitter.com/xenadu02/status/911463433521860609
:( Hope this helps.