Have to day, mixing async and CPU intensive code (I’m using Rust because it is good at CPU intensive code!) has been a frustrating experience, with lots of noise and baggage associated with spawn_blocking to make things run well.
I have had great luck using rayon for distributing CPU intensive work across available cores. If you are doing I/O I can see why async is preferable but rayon is an excellent library for parallel work.
I have found that async or even in Go with goroutines, a large amount of small threads are not faster even if they should be in theory when it comes to CPU intensive work.
I use it to generate a 3D universe (at the atomic level) but store the data as enums.
