slab

Pre-allocated storage for a uniform data type

$cargo add slab

Official docs outline

Extra Credit builds an outline of slab's docs the first time your work uses it. Until then, start at the official documentation.

idna IDNA (Internationalizing Domain Names in Applications) and Punycode.
futures-core The core traits and types in for the `futures` library.
scopeguard A RAII scope guard that will run a given closure when it goes out of scope, even if the code between panics (assuming unwinding panic). Def
winnow A byte-oriented, zero-copy, parser combinators library
zerocopy Zerocopy makes zero-cost memory manipulation effortless. We write "unsafe" so you don't have to.
toml A native Rust encoder and decoder of TOML-formatted files and streams. Provides implementations of the standard Serialize/Deserialize traits
futures-task Tools for working with tasks.
futures-util Common utilities and extension traits for the futures-rs library.
hyper A protective and efficient HTTP library for all.
crypto-common Common traits used by cryptographic algorithms
rustls Rustls is a modern TLS library written in Rust.
fastrand A simple and fast random number generator