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https://issues.apache.org/jira/browse/LUCENE-3179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13045669#comment-13045669
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Uwe Schindler commented on LUCENE-3179:
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You misunderstood me, i know what intrinsics are. My confusion was related to
that:
bq. and on CPUs without intrinsic instructions the implementation handcrafted
by Yonik was actually faster than the one in the standard library
And the so called hand crafted method is identical in src.jar and Yonik's code.
So without intrinsics, the standard library and Yoniks code should be identical
in performance, as it was same code, the last time I looked into it.
> 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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