> instead of maintaining a running process that holds a reference to a different process, we can simply stop the current process altogether until our effects ar

> instead of maintaining a running process that holds a reference to a different process, we can simply stop the current process altogether until our effects are finished. Ooof. That does not seem like an efficient replacement for promises. Blocking the world while you wait for i/o just seems like a recipe for poor performance. Or did I misunderstand this?