byte loops (*solved*)

[britlion]

And in fact, if I try the xor-shift generator ( <!-- l --><a class="postlink-local" href="http://www.boriel.com/forum/post2853.html?hilit=random#p2853">post2853.html?hilit=random#p2853</a><!-- l --> ) it finishes in 19 seconds, instead of 48...