0-cost abstraction was summarised by Stroustrup as: > What you don’t use, you don’t pay for. And further: What you do use, you couldn’t hand code any better.

0-cost abstraction was summarised by Stroustrup as: > What you don’t use, you don’t pay for. And further: What you do use, you couldn’t hand code any better. In that mind-set, it is completely okay that `sync_read` and `async_read.await` can totally compile to something different, as they abstract different things. Boats has some more thoughts on this here: https://boats.gitlab.io/blog/post/zero-cost-abstractions/ https://boats.gitlab.io/blog/post/zero-cost-abstractions/