You're all forgiven since, 1/ there's nothing to forgive, and 2/ you're of great help with such precise and thorough answers.
I still don't know how to speed up my code, but i've learnt a lot. Big thanks to you George, again. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.