These are the links for asynchronous rust:
Further Reading
Asynchronous Programming in Rust
https://rust-lang.github.io/async-book/01_getting_started/01_chapter.html
Rust Futures
Tokio
Async-Std
Rayon
The link for tokio is the same as for rayon. This might be better: GitHub - tokio-rs/tokio: A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...