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  1. Lucene - Core
  2. LUCENE-8875

Should TopScoreDocCollector Always Populate Sentinel Values?

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 8.2
    • None
    • None
    • New

    Description

      TopScoreDocCollector always initializes HitQueue as the PQ implementation, and instruct HitQueue to populate with sentinels. While this is a great safety mechanism, for very large datasets where the query's selectivity is high, the sentinel population can be redundant and can become a large enough bottleneck in itself. Does it make sense to introduce a new parameter in TopScoreDocCollector which uses a heuristic (say number of hits > 10k) and does not populate sentinels?

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              Unassigned Unassigned
              atris Atri Sharma
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