also a different question: I'm a little bit confused about what coroutine constructs have to be explicitly cancelled to free memory and what will be garbage collected automatically. Stuff like channels and jobs (outside a running coroutine) I assume will just get garbage collected without needing to call

close

or

cancel

on them?

Yes, but only when they finished work, the same as with any other callback

Yep, by finished work you mean when no coroutine is running it right?

when particular coroutine finished work (code inside coroutine invoked) such coroutine can be garbage collected