You might want to have a look at
POE about how "parallelizing" is done without threads, in a cooperative multitasking way. The POE kernel doesn't deal out time slices (thus virtually parallelizing in the way an operating system kernel does), but expects of it's programs (or "sessions") to behave nicely and give back control whenever appropriate.
--shmem
_($_=" "x(1<<5)."?\n".q·/)Oo. G°\ /
/\_¯/(q /
---------------------------- \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}
