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Rust
tokio mpsc Channel
Async multi-producer / single-consumer channel. Producers `.send()`, the single receiver `.recv().await` items as they arrive. Bounded — the channel back-pressures producers when full.
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Rust
tokio::spawn — Independent Tasks
`spawn` runs a future on the runtime as an independent task — fire-and-forget, or `.await` the returned `JoinHandle` to get its result. Equivalent to threads but multiplexed onto the worker pool.
Rust
Fan-Out with try_join_all
Run N async operations concurrently and collect every Result. Fails fast on the first error; `join_all` is the variant that always waits for everyone.
Rust
Async Timeout
Wrap any future in `tokio::time::timeout` to fail it if it takes too long. Returns `Err(Elapsed)` on timeout; you decide what to do next (retry, fall back, propagate).
Rust
Async/Await with tokio
`async fn` returns a future; `.await` drives it. tokio is the de-facto runtime. The `#[tokio::main]` attribute turns `main` into the runtime entry point.