Struct FxHasher 

pub struct FxHasher { /* private fields */ }

Non-cryptographic hasher for in-memory frame-to-frame change detection.

Every step of the fold — rotate, xor with the next word, multiply by an odd constant — is a bijection on u64, so equal-length inputs never collide structurally; only the unavoidable 64-bit pigeonhole remains. finish applies the SplitMix64 finalizer, itself a bijection, which adds no collisions and gives full avalanche so the result is safe to use directly as a HashMap key hash.

Trait Implementations

impl Clone for FxHasher

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for FxHasher

impl Default for FxHasher

fn default() -> Self

Returns the “default value” for a type.

impl Hasher for FxHasher

fn write(&mut self, bytes: &[u8])

Writes some data into this Hasher.

fn write_u8(&mut self, value: u8)

Writes a single u8 into this hasher.

fn write_u16(&mut self, value: u16)

Writes a single u16 into this hasher.

fn write_u32(&mut self, value: u32)

Writes a single u32 into this hasher.

fn write_u64(&mut self, value: u64)

Writes a single u64 into this hasher.

fn write_u128(&mut self, value: u128)

Writes a single u128 into this hasher.

fn write_usize(&mut self, value: usize)

Writes a single usize into this hasher.

fn finish(&self) -> u64

Returns the hash value for the values written so far.

fn write_i8(&mut self, i: i8)

Writes a single i8 into this hasher.

fn write_i16(&mut self, i: i16)

Writes a single i16 into this hasher.

fn write_i32(&mut self, i: i32)

Writes a single i32 into this hasher.

fn write_i64(&mut self, i: i64)

Writes a single i64 into this hasher.

fn write_i128(&mut self, i: i128)

Writes a single i128 into this hasher.

fn write_isize(&mut self, i: isize)

Writes a single isize into this hasher.

fn write_length_prefix(&mut self, len: usize)

🔬This is a nightly-only experimental API. (hasher_prefixfree_extras)

Writes a length prefix into this hasher, as part of being prefix-free.

fn write_str(&mut self, s: &str)

🔬This is a nightly-only experimental API. (hasher_prefixfree_extras)

Writes a single str into this hasher.