[LUCENE-9712] UnifiedHighlighter, optimize WEIGHT_MATCHES when many fields

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: modules/highlighter
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: David Smiley
• Created: 29/Jan/21 20:59
• Updated: 28/Aug/22 16:13

Description

A user reported that highlighting many fields per document in WEIGHT_MATCHES mode is quite slow:   https://lists.apache.org/thread.html/r152c74a884b5ff72f3d530fc452bb0865cc7f24ca35ccf7d1d1e4952%40%3Csolr-user.lucene.apache.org%3E

The query is a DisjunctionMax over many fields – basically the ones being highlighted.