Crate

tokio-util

Utilities and adaptors extending the tokio async runtime.

What it is

tokio-util extends tokio with the Codec trait and Framed type for length-prefixed and line-delimited network protocols, stream utilities, task management primitives, and compatibility adaptors between tokio I/O and futures I/O traits.

Why it is commonly used

Used when building custom network protocols on top of tokio — implementing message framing, line-based protocols, or any codec that splits a raw byte stream into discrete application-level messages.

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