Crate rustc_hash

Available on crate feature map only.

A speedy, non-cryptographic hashing algorithm used by rustc.

Example

use rustc_hash::FxHashMap;

let mut map: FxHashMap<u32, u32> = FxHashMap::default();
map.insert(22, 44);

Structs

• FxBuildHasher
  An implementation of BuildHasher that produces FxHashers.
• FxHasher
  A speedy hash algorithm for use within rustc. The hashmap in liballoc by default uses SipHash which isn’t quite as speedy as we want. In the compiler we’re not really worried about DOS attempts, so we use a fast non-cryptographic hash.
• FxRandomState
  FxRandomState is an alternative state for HashMap types.
• FxSeededState
  [FxSetState] is an alternative state for HashMap types, allowing to use FxHasher with a set seed.

Type Aliases

• FxHashMapstd
  Type alias for a hash map that uses the Fx hashing algorithm.
• FxHashMapRand
  Type alias for a hashmap using the fx hash algorithm with FxRandomState.
• FxHashMapSeedstd
  Type alias for a hashmap using the fx hash algorithm with FxSeededState.
• FxHashSetstd
  Type alias for a hash set that uses the Fx hashing algorithm.
• FxHashSetRand
  Type alias for a hashmap using the fx hash algorithm with FxRandomState.
• FxHashSetSeedstd
  Type alias for a hashmap using the fx hash algorithm with FxSeededState.