It took awhile for the slides to download. Mostly I posted that link because it had just appeared as the top item at Lambda the Ultimate and I was also thinking about how much concurrency sucks in Perl. I've been a bytstander when you and others have discussed how to use Perl threads and it's all looked like a big pile of pain. I have a hard time coming up with cases where I'd want to have concurrency in Perl with threads+shared variables rather than with forks+anything external. Blech. At least Parrot and Pugs seem to be addressing these directly. Parrot with it's concurrency PDD and then both with their interest in STM.

Of course, I'm really novice when it comes to thinking about architecting concurrency. Just this morning by the bus-stop it occurred to me why single-assignment variables (and therefore functional style) go hand-in-hand with concurrency oriented language. It's about getting only "forward" motion which I assume has something to do with having manageable data flow dependencies.