Xcode Simulator animations extremely slow when played in editor

Recently I have experienced, that Xcode's simulator has become extremely slow. Also if I create a new app and run it i, the transition between the launch screen and the first view controller takes about 3 seconds. Luckily it is only the iOS 9 simulator and not iOS 8 or lower. I have upgraded to Xcode 6.4 and I also have Xcode 7.0 beta 3 installed. Has anyone experienced the same? I have tried to uninstall both Xcode versions, but it didn't help.

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.

Currently only iOS11 simulator is slow.

You can download additional iOS10 simulator which works perfectly.

Choose Xcode -> Product -> Destination -> Download simulators... Then select any iOS10 simulator from the list (e.g. 10.3.1).

After that you will choose iOS version for most devices: