Simple Dispatch Queue

dispatchqueue.swift

        DispatchQueue.global(qos: .background).async {
            var x:Int = 0
            while (x < Int.max){
                x+=1
                var y:Int = 0
                while (y < Int.max){
                    y+=1
                    if (y % 10000 == 0){
                        DispatchQueue.main.async {
                            self.numbers.text = "value x:\(x) y:\(y)}"
                        }
                    }
                }
            }
        }