James Sewell 4480cf0a98 Enable BMW for single-scorer boolean queries by removing early return in scorer_union (#2915) ...

The early return for `scorers.len() == 1` in `scorer_union` short-circuits a single TermScorer into `SpecializedScorer::Other`, bypassing the `TermUnion` path that enables block-max WAND (BMW) in `for_each_pruning`.

This was originally addressed in PR #2898 (backed out), which added a special case in `BooleanWeight::for_each_pruning`. PR #2912 (merged as d27ca164a) added a single-scorer fast path inside `block_wand` itself, but did not remove this early return — so a single SHOULD TermScorer still never reaches the BMW path.

Removing the early return lets a single TermScorer with freq reading flow through to `SpecializedScorer::TermUnion`, where `block_wand` → `block_wand_single_scorer` handles it efficiently.

2026-04-28 14:49:53 -07:00

..

block_wand_intersection.rs

Optimizing top K using Adrien Grand's ideas (#2865)

2026-04-26 12:14:40 +02:00

block_wand_union.rs

Optimizing top K using Adrien Grand's ideas (#2865)

2026-04-26 12:14:40 +02:00

boolean_query.rs

fix union performance regression (#2663)

2025-07-01 20:32:25 +02:00

boolean_weight.rs

Enable BMW for single-scorer boolean queries by removing early return in scorer_union (#2915)

2026-04-28 14:49:53 -07:00

mod.rs

Optimizing top K using Adrien Grand's ideas (#2865)

2026-04-26 12:14:40 +02:00