Struct ScalarQuantizedIndex 

pub struct ScalarQuantizedIndex { /* private fields */ }

Compact scalar-int8 cosine index.

Stored vectors use one byte per component plus one norm scalar. Search distances are quantized approximations unless Self::search_rerank is used with an owned f32 index.

Implementations

impl ScalarQuantizedIndex

pub fn build( config: IndexConfig, vectors: &[(u64, &[f32])], ) -> Result<Self, SearchError>

Validates, normalizes, and quantizes dense vectors.

Errors

Returns typed config, vector, duplicate-key, capacity, or allocation errors.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub const fn dimensions(&self) -> usize

pub const fn config(&self) -> &IndexConfig

pub fn estimated_memory_bytes(&self) -> usize

Allocation-based retained size estimate.

pub fn search( &self, query: &[f32], count: usize, ) -> Result<Vec<SearchHit>, SearchError>

Returns scalar-int8 approximate cosine hits.

Errors

Returns a typed query validation or allocation error.

pub fn search_rerank( &self, oracle: &VectorIndex, query: &[f32], count: usize, candidates: usize, ) -> Result<Vec<SearchHit>, SearchError>

Retrieves a wider quantized candidate set and re-scores it with exact normalized f32 vectors from oracle.

Errors

Returns a typed query, missing-key, or allocation error.

pub fn search_batch( &self, queries: &[&[f32]], count: usize, ) -> Result<Vec<Vec<SearchHit>>, SearchError>

Searches independent queries with bounded workers.

Errors

Returns the first query error in input order or a worker-panic error.

Trait Implementations

impl Debug for ScalarQuantizedIndex

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

Formats the value using the given formatter.

impl SearchShard for ScalarQuantizedIndex

fn dimensions(&self) -> usize

fn search_shard( &self, query: &[f32], count: usize, ) -> Result<Vec<SearchHit>, SearchError>

Searches this shard.