Struct L2 

pub struct L2;

Squared Euclidean distance over Vec<f32> / [f32] points.

Returns Σᵢ (aᵢ − bᵢ)² — not the square root. For HNSW this is equivalent (monotonic in the true L² distance) and avoids a sqrt per comparison.

Panics in debug builds if input lengths differ; in release builds, trailing elements of the longer slice are ignored.

Trait Implementations

impl Clone for L2

fn clone(&self) -> L2

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for L2

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for L2

fn default() -> L2

Returns the “default value” for a type.

impl Metric for L2

type Point = Vec<f32>

The point type this metric measures distances between.

fn distance(&self, a: &Self::Point, b: &Self::Point) -> f32

Compute the distance between two points.

fn dim(&self, point: &Self::Point) -> usize

Return the number of dimensions / components of point.

impl Copy for L2