I thought that the purpose of the article it to get the same result with two diff approaches, but here we got two different results with two different approaches, right? As with approaches of OperationQueue, we did almost everything in parallel and with the approach of async/await we did everything sequentially. If we compare the time taken by these two approaches for execution we'll see that the OperationQueue approach does its job much faster than the async/await one, do you agree?