Async & Futures

12 pages in this section.

Why an `async fn` compiles to a lazy, poll-based state machine, why that state machine does nothing without an executor, and why self-referential state machines force the `Pin` API to exist.

Explainer Rust Async Futures

Async Basics

Explore Rust async basics with 9 examples. Learn about async fn, lazy futures, and concurrent tasks using tokio::spawn.

Rust Async Futures Basics

The Future Trait

Rust Async Future Poll

Executors & Runtimes

Rust Async Executor Runtime

Pinning & Unpin

Rust Async Pin Unpin

async fn in Traits

Rust Async Traits Async Trait

Streams

Learn to use the Stream trait for async iteration in Rust, handling paginated APIs, WebSockets, and event feeds with examples.

Rust Async Streams Iteration

Combining Futures

Combine Rust futures using join!, try_join!, select!, or FuturesUnordered to run independent async tasks concurrently or race for the first completion.

Rust Async Join Select

Cancellation & Timeouts

Learn how Rust async cooperative cancellation works by dropping futures or calling JoinHandle::abort. Implement timeouts and graceful shutdowns.

Rust Async Cancellation Timeouts

Blocking in Async

Rust Async Blocking Spawn Blocking

Async Best Practices

Learn best practices for responsive async Rust services, covering non-blocking I/O, structured concurrency, and runtime boundaries for Axum/Tokio.

Rust Async Best Practices List

Async & Futures Highlights Summary

A single-page roundup of every highlight bullet from the 11 pages in the Async & Futures section, grouped by source page so you can scan all 65 takeaways without opening each article individually.

Highlights Summary Async Futures

Async & Futures

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Async & Futures