Struct Encoder 

pub struct Encoder { /* private fields */ }

The prepared recipe: sign vectors and scales are FIXED per (seed, width), so they are computed once here, never per vector. Before this hoist the encode path allocated fresh sign vectors and re-ran the PRNG for EVERY vector – measured 3.3x on the 250K ingest ladder; the hoist plus ROUNDS 3 -> 1 (recall unchanged at 1.000 on both the gaussian and the hostile sparse dataset; the identity-rotation mutation fails the sparse case at 0.555) brought bulk 15.9s -> 8.6s.

Implementations

impl Encoder

pub fn new(dim: usize, seed: u64, bits: usize) -> Encoder

pub fn bits(&self) -> usize

pub fn padded(&self) -> usize

pub fn rotate(&self, x: &mut [f32])

Rotate x (already padded) in place.

pub fn encode(&self, v: &[f32]) -> (f32, Vec<u8>)

Encode: returns (norm, packed code) for a raw vector (dim <= padded).

pub fn rotate_query(&self, q: &[f32]) -> Vec<f32>

Pad + rotate a query once per search.

impl Encoder

pub fn affine_query(&self, q: &[f32]) -> AffineQuery