Xcode Simulator animations extremely slow when played in editor

Question

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 fir

Answer 1

In Simulator menu, go to Debug > Slow Animations , and uncheck this option or simply do:

⌘ + T

Answer 2

I had this same problem, and after scratching my head for a while, I realized that having the Xcode "Organizer" window open while running the Simulator causes it to behave very slowly. So for anyone who doesn't have the "slow animations" option ticked, check that the Organizer window isn't open.

Answer 3

If you press command+T it triggers the 'Slow animations' feature. I didn't noticed this setting until now. Doh!

Answer 4

It's known bug by apple developer see below link https://forums.developer.apple.com/thread/83570

Answer 5

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.

Answer 6

This has been fixed in Xcode 9.1 beta 2

Fixed an issue in Simulator’s OpenGL that could cause SceneKit apps to run slowly and the CPU to hit 100% when attempting to pan in an MKMapView.