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Separate sequential-read from merge in StoredFieldsReader (allow different instances for read vs merge )

type:enhancement

Status: Open.

#16427 In apache/lucene;

· VijayanB opened on Jul 27, 2026

[ENH]: Adaptive Facet Engine: Single-Pass Posting-Based Aggregation for Low-Cardinality Fields (+465% QPS)

type:enhancement

Status: Open.

#16426 In apache/lucene;

· rajat315315 opened on Jul 27, 2026

Incorporate DocValuesSkipper into IndexOrDocValuesQuery's cost decision

Status: Open.

#16425 In apache/lucene;

· mayya-sharipova opened on Jul 27, 2026

ENH: Convert Hunspell Dictionary affix directive parsing else-if chain to switch

type:enhancement

Status: Open.

#16421 In apache/lucene;

· rajat315315 opened on Jul 26, 2026

HNSW-wrapped scalar-quantized fields never hit the centroid fast-path: every delete-free merge re-reads all source floats to recompute a value it already stores

Status: Open.

#16420 In apache/lucene;

· john-mlika opened on Jul 25, 2026

branch_10x: KnnVectorsReader.finishMerge() has no caller — merges permanently flip shared vector inputs to SEQUENTIAL read-advice

Status: Open.

#16419 In apache/lucene;

· john-mlika opened on Jul 25, 2026

ENH: Optimize StateSet.equals to avoid array allocation and sorting in Operations.determinize()

type:enhancement

Status: Open.

#16413 In apache/lucene;

· rajat315315 opened on Jul 22, 2026

TestJoinUtil.testRandomOrdinalsJoin fails due to float precision in GlobalOrdinalsWithScoreCollector

type:test

Status: Open.

#16408 In apache/lucene;

· john-wagster opened on Jul 20, 2026

PointInSetQuery#ramBytesUsed under-reports memory: retained lowerPoint / upperPoint arrays not accounted for

type:bug

Status: Open.

#16405 In apache/lucene;

· Sasilekha opened on Jul 19, 2026

HNSW graph reuse during merge is silently disabled under per-field codecs since 10.4.0

type:bug

Status: Open.

#16400 In apache/lucene;

· jeho-rpls opened on Jul 16, 2026

PR benchmark bot for Lucene?

type:enhancement

Status: Open.

#16398 In apache/lucene;

· sgup432 opened on Jul 16, 2026

Expose per-field on-disk byte-range layout from codec readers

type:enhancement

Status: Open.

#16392 In apache/lucene;

· abernardi597 opened on Jul 14, 2026