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https://issues.apache.org/jira/browse/LUCENE-3179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045655#comment-13045655
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Uwe Schindler commented on LUCENE-3179:
---------------------------------------

If it's faster, should we not replace it completely in Lucene? The impl in Java 
5 (Sun JDK) is identical to ours from BitUtils, so why replicate? If it gets 
intrinsic, it can only get faster. I assume its a relict from pre-Java-1.5 
times like Lucene 2.9.

> OpenBitSet.prevSetBit()
> -----------------------
>
>                 Key: LUCENE-3179
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3179
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Paul Elschot
>            Priority: Minor
>             Fix For: 3.3
>
>         Attachments: LUCENE-3179.patch
>
>
> Find a previous set bit in an OpenBitSet.
> Useful for parent testing in nested document query execution LUCENE-2454 .

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