Rust Async WG member here: This question comes up pretty regularly when people first learn about async Rust. I suspect it’s because performance is often emphasi

Rust Async WG member here: This question comes up pretty regularly when people first learn about async Rust. I suspect it’s because performance is often emphasized as the main benefit of async Rust. In my opinion performance is always relative and dependent on the workload. Instead it’s worth looking more at which capabilities async Rust provides which aren’t present in non-async Rust. This includes ad-hoc cancellation, ad-hoc concurrency, and combining the two into things such as timeouts. I wrote a post explaining this in detail a few months ago: https://blog.yoshuawuyts.com/why-async-rust/ https://blog.yoshuawuyts.com/why-async-rust/