A short overview.

I/O

• Model data flow with futures
• Let tokio’s event loop handle non-blocking I/O
• Use libraries built on tokio that implement the protocols you need

Parallel processing

• Use rayon to make your iterators use all CPU cores
• Use crossbeam’s scoped threads to manually execute things in parallel

Data structures

• Use crossbeam’s data lock-free data structures if you need to access data from multiple threads