[jrochkind1]

It seems like Go uses it's own threads but backed by OS threads, rather than actually pure green threads. Yes?

But yeah, a whole lot of people seem to think "man, OS threads suck, surely we can do better with green threads," only to find out why OS threads suck, and that many developer-years of work have gone into making them not suck more.

[pron]

OS threads by no means suck, but they can't make certain assumptions that lightweight threads can about thread behavior. They're great for a lot of processing, but not so great when they have to constantly block and unblock.