[LUCENE-3719] FVH: slow performance on very large queries

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 3.5, 4.0-ALPHA
• Fix Version/s: 3.6, 4.0-ALPHA
• Component/s: modules/highlighter
• Lucene Fields: New, Patch Available
• Assignee: Koji Sekiguchi
• Reporter: Igor Motov
• Created: 24/Jan/12 14:15
• Updated: 28/Aug/22 13:06
• Resolved: 30/Jan/12 02:20

Description

The change from HashSet to ArrayList for flatQueries in LUCENE-3019 resulted in very significant slowdown in some of our e-discovery queries after upgrade from 3.4.0 to 3.5.0. Our queries sometime contain tens of thousands of terms. As a result, major portion of execution time for such queries is now spent in the flatQueries.contains( sourceQuery ) method calls.