Enum Distance 

pub enum Distance {
    Cosine,
    Euclidean,
    DotProduct,
}

Supported distance metrics for similarity computation

Variants

Cosine

Cosine similarity (1 - cos(θ)) Vectors should be normalized for best performance Lower score = more similar

Euclidean

Euclidean distance (L2 norm) Lower score = more similar

DotProduct

Dot product (inner product) Higher score = more similar (negated internally for min-heap)

Implementations

impl Distance

pub fn compute(&self, a: &[f32], b: &[f32]) -> f32

Compute distance between two vectors

Arguments

• a - First vector
• b - Second vector

Returns

Distance value (lower = more similar for Cosine/Euclidean)

Panics

Panics if vectors have different lengths

pub fn compute_simd(&self, a: &[f32], b: &[f32]) -> f32

Compute distance with SIMD optimization (when available)

Trait Implementations

impl Clone for Distance

fn clone(&self) -> Distance

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Distance

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

Formats the value using the given formatter.

impl Default for Distance

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Distance

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for Distance

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Distance

fn eq(&self, other: &Distance) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Distance

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Distance

impl Eq for Distance

impl StructuralPartialEq for Distance