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.