Function l2_sq

nodedb-codec/src/vector_quant/opq_kmeans.rs:9–11

(a: &[f32], b: &[f32])

/// L2 squared distance between two equal-length slices.
#[inline]
pub fn l2_sq(a: &[f32], b: &[f32]) -> f32 {
    a.iter().zip(b.iter()).map(|(x, y)| (x - y).powi(2)).sum()
}

/// Lloyd's k-means clustering.
///