Hello,
I have noticed a performance drop on SpriteKit-based projects running on iOS 26.0 (23A341).
Below is a SpriteKit scene used to test framerate on different devices:
import SpriteKit
import SwiftUI
class BareboneScene: SKScene {
override func didMove(to view: SKView) {
size = view.bounds.size
anchorPoint = CGPoint(x: 0.5, y: 0.5)
backgroundColor = .darkGray
let roundedSquare = SKShapeNode(rectOf: CGSize(width: 150, height: 75), cornerRadius: 12)
roundedSquare.fillColor = .systemRed
roundedSquare.strokeColor = .black
roundedSquare.lineWidth = 3
addChild(roundedSquare)
let action = SKAction.rotate(byAngle: .pi, duration: 1)
roundedSquare.run(.repeatForever(action))
}
}
struct BareboneSceneView: View {
var body: some View {
SpriteView(
scene: BareboneScene(),
debugOptions: [.showsFPS]
)
.ignoresSafeArea()
}
}
#Preview {
BareboneSceneView()
}
The scene is very simple, yet framerate drops to ~40 fps as shown by the Metal HUD. Tested on:
- iPhone 13, iOS 26.0: framerate drops to 40 fps. Sometimes it runs at near 60fps. But if the screen is touched repeatedly, the framerate drops to 40-50 fps again.
- iPhone 11 Pro, iOS 26.0: ~40fps.
- iPad 9th Gen, iOS 18.6.2: 60fps, no issues.
See screenshots attached. These numbers were observed by me and members of our beloved SpriteKit Discord server.
Thank you for your attention.
Hello,
We appreciate your bringing this up.
Please send a bug report for SpriteKit performance regression on iOS 26.
