BlockMaxWandScorer

Namespace

Rowles.LeanLucene.Search.Scoring

Assembly

Rowles.LeanLucene.dll

Block-Max WAND (Weak AND) scorer for top-K query evaluation. Uses per-block impact metadata (maxFreq, maxNorm) stored in skip data to skip entire 128-doc blocks whose maximum possible score contribution falls below the current threshold θ (score of the Kth-best doc seen so far).

internal sealed class BlockMaxWandScorer

BlockMaxWandScorer

Remarks

This scorer works with any BM25-based scoring function. For each postings list, the block's maximum possible score is precomputed from maxFreqInBlock and maxNormInBlock. If no block can beat the current threshold, the entire term is skipped.

Constructors

BlockMaxWandScorer(TermScorer[], int, float, float, float)

Properties

BlocksScored

Number of blocks fully scored.

BlocksSkipped

Number of blocks skipped due to WAND threshold.

Methods

Score()

Executes the Block-Max WAND algorithm for a disjunctive (OR) query over all term scorers. Returns top-K results.