But, it does what you want (plus more). You sort of took a spoke of a wheel, and rewrote the spoke :) Your code isn't any more modular than the one from PPT. Point being that there is good code written to do what you wanted, but instead of using it (embedding what you needed), or modularizing it you redid it. I'm not griping, but when you show a lot of benchmarks you obviously took time to do it multiple ways to see which is fastest (fast ne best) as opposed to taking the time to make a current wheel more useful. But, like I said before, seems like you had a good exercise :)

Cheers,
KM