[conradludgate]

This is not true for Rust. Await in rust builds a larger state machine from the former. It does no implicit thread or task spawns (unless the future you're awaiting does them explicitly).

Furthermore, async rust can be run single threaded

[vc8f6vVV]

What happens if I block a future in a single threaded runtime?

[conradludgate]

Then you block the runtime? _aha you got me, threads and pre-emptive concurrency is better_.

This is where you have a reasonable trade off. I have accepted that async gives me more control over my code. For that I have to accept that blocking can slow down the app. After running async rust in production for over 2 years now I've not seen any blocking tasks block the executor. Maybe I'm just good but my experience is that my colleagues who come from C# generally don't make these mistakes either