This does not solve the problem. With channels you are preparing things (even just one thing) ahead of time and you have to do it in a separate goroutine. One c

This does not solve the problem. With channels you are preparing things (even just one thing) ahead of time and you have to do it in a separate goroutine. One could possibly (haven't tried or given more than 2s of thought) implement a channel (or at least part of it) using iterators.