In my previous post, I wrote about the distinction between “multi-task” and “intra-task” concurrency in async Rust. I want to open this post by considering a common pattern that users encounter, and how they might implement a solution using each technique.Let’s call this “sub-tasking.” You have a unit of work that you need to perform, and you want to divide that unit into many smaller units of work, each of which can be run concurrently. This is intentionally extremely abstract: basically every ...