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https://issues.apache.org/jira/browse/LUCENE-4289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13428962#comment-13428962
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Koji Sekiguchi commented on LUCENE-4289:
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+1. Thanks, Robert.
> highlighter idf calculation problems
> ------------------------------------
>
> Key: LUCENE-4289
> URL: https://issues.apache.org/jira/browse/LUCENE-4289
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Robert Muir
> Attachments: LUCENE-4289.patch
>
>
> * highlighter uses numDocs instead of maxDoc
> * fastvectorhighlighter uses numDocs - numDeletedDocs instead of maxDoc (will
> go negative if more than half of docs are marked deleted)
> * fastvectorhighlighter calls docFreq and computes IDF per-position when it
> won't change (inefficient)
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