And when they need to communicate, use a simple to understand, easy to use, safe, conceptually clean and almost trivially programmed abstraction (Thread::Queue) and almost anyone can program a threaded application with ease.
Oblig. and shameless plug for Thread::Apartment, which hopefully goes even
further to ease the process (tho, admittedly, its still a bit warty).
Alas, the current threads::shared creates a bit of a barrier to
large scale threading (shared nothing/MP or otherwise) due to the global
interpretter lock. But an alternative is being worked on. And while current ithreads is a
burden, some of that could be alleviated by iCOW - if ever implemented.
I won't comment on Perl 6. I have problems to solve last year, and can't
wait for it. Perl 5 is quite capable of concurrency, be it threaded or
Perl Contrarian & SQL fanboy