Method asymmetric_distance

nodedb-vector/src/quantize/pq.rs:180–187

(&self, table: &[Vec<f32>], code: &[u8])

    /// O(M) per candidate — just M table lookups and additions.
    #[inline]
    pub fn asymmetric_distance(&self, table: &[Vec<f32>], code: &[u8]) -> f32 {
        debug_assert_eq!(code.len(), self.m);
        let mut dist = 0.0f32;
        for (sub, &c) in code.iter().enumerate() {
            dist += table[sub][c as usize];
        }
        dist
    }

    /// Decode a PQ code back to an approximate FP32 vector.
    ///