I am aware, it's simply the most portable universal solution to the problem that I could think of. AIO comes with its own share of issues; Unix (and thus Posix) are pretty much dead; and it's not universal, I can't use it to open a database connection unless the database has support built-in.

From what I know, cooperative multitasking suffers significantly less from unpredictable performance than preemptive threading. The biggest source of uncertainty in Snigl is the preemptive IO loop.

The things is that I really don't feel like writing a concurrent runtime; been there, done that. I'm planning something along the lines of Erlang's processes and channels based on separate interpreters for those scenarios.