[jira] [Resolved] (LUCENE-5416) Performance of a FixedBitSet variant that uses Long.numberOfTrailingZeros()

["Paul Elschot (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5416?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Elschot resolved LUCENE-5416.
----------------------------------

    Resolution: Done

See measurements and patch with Long.numberOfTrailingZeros at LUCENE-5425.

> Performance of a FixedBitSet variant that uses Long.numberOfTrailingZeros()
> ---------------------------------------------------------------------------
>
>                 Key: LUCENE-5416
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5416
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/search
>    Affects Versions: 5.0
>            Reporter: Paul Elschot
>            Priority: Minor
>             Fix For: 5.0
>
>
> On my machine the current byte index used in OpenBitSetIterator is slower than Long.numberOfTrailingZeros() for advance().
> The pull request contains the code for benchmarking this taken from an early stage of DocBlocksIterator.
> In case the benchmark shows improvements on more machines, well, we know what to do...



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