Struct LazyGlobalStats 

pub struct LazyGlobalStats { /* private fields */ }

Lazy global statistics bound to a fixed set of segments

Computes IDF values lazily on first access and caches them. Lifetime is bound to the Searcher that created it, ensuring statistics always match the current segment set.

Implementations

impl LazyGlobalStats

pub fn new(segments: Vec<Arc<SegmentReader>>) -> Self

Create new lazy stats bound to a set of segments

pub fn total_docs(&self) -> u64

Total documents across all segments

pub fn sparse_idf(&self, field: Field, dim_id: u32) -> f32

Get or compute IDF for a sparse vector dimension (lazy + cached)

IDF = ln(N / df) where N = total docs, df = docs containing dimension

pub fn sparse_idf_weights(&self, field: Field, dim_ids: &[u32]) -> Vec<f32>

Compute IDF weights for multiple sparse dimensions (batch, uses cache)

pub fn text_idf(&self, field: Field, term: &str) -> f32

Get or compute IDF for a full-text term (lazy + cached)

IDF = ln((N - df + 0.5) / (df + 0.5) + 1) (BM25 variant)

pub fn avg_field_len(&self, field: Field) -> f32

Get or compute average field length for BM25 (lazy + cached)

pub fn num_segments(&self) -> usize

Number of segments

Trait Implementations

impl Debug for LazyGlobalStats

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

Formats the value using the given formatter.