Speeding up animations in iOS

// Conform to this protocol if you need to save animation in tests. It's window.layer.speed won't be affected
protocol AnimationsInTestSupportable: AnyObject {}

private var fastAnimationsWasSetUp = false

public final class AnimationRemoverForQaAutomation: NSObject {
    @objc public static func setUpSwizzling() {
        guard FeatureToggle.features.speedUpAnimationsInE2ETests != fastAnimationsWasSetUp
        else { return }

        guard let originalMethod = class_getInstanceMethod(
            UIView.self,
            #selector(UIView.didMoveToSuperview)
        ) else { return }

        guard let swizzledMethod = class_getInstanceMethod(
            UIView.self,
            #selector(UIView.swizzled_didMoveToSuperview_AnimationRemoverForQaAutomation)
        ) else { return }

        method_exchangeImplementations(originalMethod, swizzledMethod)

        fastAnimationsWasSetUp = FeatureToggle.features.speedUpAnimationsInE2ETests
    }
}

extension UIView {
    @objc func swizzled_didMoveToSuperview_AnimationRemoverForQaAutomation() {
        swizzled_didMoveToSuperview_AnimationRemoverForQaAutomation()

        // I tried 1e+20, got black screen.
        // I tried 1_000_000, got many other problems.
        // I tried 10_000, got some problems.
        if !(self is AnimationsInTestSupportable) {
            let bigNumberButNotSoBig: Float = 100
            self.window?.layer.speed = bigNumberButNotSoBig
        }
    }
}