Did you actually read the code. I think if they were going to do that it would be a literal sleep instruction rather than a naievely used way of looping over data

edit: Akchually, the DRY method of doing this would be to make a function like:

    /* Remove this when it's time for a performance improvement! */
    function Optimize(int N)
        /* do stuff N times (so you can limit the amount of performance improvement) */
    end

and then put that in the places you want to be able to optimize in the future