fastutil-rs

Fast utilities and optimizations for Rust.

fastutil-rs is a convenience crate that wraps around other crates to provide faster, or otherwise useful replacements for common things in Rust, like collections, random number generators, etc.

Features

• no_std and WASM support
• 100% safe

Optional Features

• std uses the Rust standard library to provide collections
• alloc uses alloc + hashbrown to provide collections
• hash (default) provides a fast platform-based hashing algorithm
  • gxhash only works on x86-64 and aarch64.
  • Falls back to zwohash on other systems.
• indexmap (default) provides a HashMap and HashSet that keeps insertion order
• multimap (std only) provides a HashMap which stores multiple values
• rand (default) provides minimal RNG implementations from smolcrush
• serde enables (de)serialization of collections
• nightly provides nightly-only optimizations
  • likely and unlikely can be wrapped around conditions to help the compiler optimize if statements based on the likelihood of them being true.
  • This also enables nightly optimizations for hashbrown if alloc is being used.

Minimum Supported Rust Version (MSRV)

The current MSRV is 1.63.0.