Generating new nodes causing frame drop [SpriteKit]

Question

I'm trying to generate new nodes in scene

func generateNewPlatform(inScene: SKScene) {
   for _ in 0...25 {
       let xPosition = randomXPosition()
       let yPosition = randomYPosition()

       let platform = Platform.create(
       platform.position = CGPoint(x: xPosition, y: yPosition)
       inScene.addChild(platform)
   }   
}

I need to generate it every 10 seconds, of course I remove old by

removeFromParent()

But when I do it, it causing frame drop (1-5, depending on the device)

How can I handle this frame drop?

Answer 1

You can push the calculation job into background queue to stop them from blocking the UI, maybe the Platform creation is expensive:

func generateNewPlatform(inScene: SKScene) {
    var platforms = [Platform]()
    DispatchQueue.global(qos: .userInitiated).async {
        for _ in 0...25 {
            let xPosition = randomXPosition()
            let yPosition = randomYPosition()

            let platform = Platform.create(..)
            platform.position = CGPoint(x: xPosition, y: yPosition)
            platforms.append(platform)
        }
        DispatchQueue.main.async {
            platforms.forEach {
                inScene.addChild($0)
            }
        }
    }
}