Anything in particular your curious about? For a few similar things: * It can Yield from anywhere * You can push data on the stack when creating a co-routine

Anything in particular your curious about? For a few similar things: * It can Yield from anywhere * You can push data on the stack when creating a co-routine * It has a slot for local storage in the coroutine (the library you linked calls it user_data). * It should be pretty light weight since it uses assembly and saves as little state as possible based off the calling the conventions. There are differences though. One big difference is I do have functions that let you call functions that generate deep call stacks on the thread stack.