tokio

Tokio's select! macro lets you wait on multiple futures simultaneously, proceeding with the first one that completes. I use it for timeouts, graceful shutdown, and racing I/O operations. Each branch is a pattern match on the future's output. If multip

Tokio's spawn creates a new async task that runs concurrently on the runtime's thread pool. Unlike OS threads, tasks are lightweight (kilobytes of memory) and scheduled cooperatively. Each task must be 'static and Send, meaning it can't borrow local v

Rust's async/await syntax lets you write asynchronous code that looks synchronous. An async fn returns a Future, which is a lazy computation. Calling .await yields control until the future is ready, allowing other tasks to run. Tokio is the most popul