Avoid Async Rust At All Cost Avoid async in your codebase and in your dependencies at all cost. Reasons: Leaky abstraction problem which leads to "async contamination". Violation of the zero-cost abstractions principle. Major degradation in developer's productivity. Most advertised benefits are imaginary, too expensive (unless you are FAANG) or can be achieved without async. Alternatives: Event loop using kernel mechanism - kqueue/epoll. Threads. Threads + Event Loop Golang/Erlang The Long Story...