>>Try (4) only for starters ( you may want to play with 64 and try different values) , and take it to 500 iterations so you can compare with the previous results
>
>Same thing - start with ~0.14 sec. and end with 1.73 sec.
>
>I'm thinking - can it help to sleep for, say, 2 sec. after 50 iterations?


So, no improvement at all - gonna sleep on it