"Ken Sprague"  wrote
....
> Thanks Gotoken.  Unfortunately, these coroutines are based on Ruby threads,
> which are too resource expensive for my use.  I'm looking for an
> implementation of coroutines which are little more than "global gotos", so
> that tens or even hundreds of thousands of them can be running at the same
> time.

How about using stackless Python?

/Christoph