spritekit ios9 fps drop

Question

I've noticed a major drop in fps in my sprite kit game having upgraded from iOS 8.4 to iOS 9. Has anyone else encountered this?

My texture atlases are still buried away in .atlas files. I've tried to use the asset catalog texture atlas functionality as an experiment and that gives even worse performance.

Answer 1

Have you tried this?

skView.ignoresSiblingOrder = YES;

You will probably have to set some zValues explicitly after the change, but the number of draw calls will hopefully be reduced. You can BTW display the number of draw calls by this line:

skView.showsDrawCount = YES;

https://developer.apple.com/library/ios/documentation/GraphicsAnimation/Conceptual/SpriteKit_PG/Nodes/Nodes.html