Crate

tokio

Asynchronous runtime for Rust — I/O, timers, and tasks.

What it is

Tokio is the dominant async runtime for Rust. It provides an event loop, async I/O for TCP/UDP/files, timers, channels, and a task scheduler. Most async Rust code targets Tokio and uses its types for networking, concurrency, and time.

Why it is commonly used

The de-facto choice for async Rust — web servers, network clients, database drivers, gRPC services, and any application that handles concurrent I/O. Most async-capable libraries in the ecosystem assume a Tokio runtime.

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