[jira] [Closed] (LUCENE-5993) Remove DocIdBitSet, WAH8DocIdSet and PForDeltaDocIdSet

["Adrien Grand (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/LUCENE-5993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand closed LUCENE-5993.
--------------------------------
    Resolution: Fixed

> Remove DocIdBitSet, WAH8DocIdSet and PForDeltaDocIdSet
> ------------------------------------------------------
>
>                 Key: LUCENE-5993
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5993
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>             Fix For: 5.0
>
>         Attachments: LUCENE-5993.patch
>
>
> Follow-up of LUCENE-5983. We now have 6 doc id set implementations that can be used to cache filter:
>  - FixedBitSet
>  - WAH8DocIdSet
>  - PForDeltaDocIdSet
>  - EliasFanoDocIdSet
>  - SparseFixedBitSet
>  - RoaringDocIdSet
> Some of them are required due to unique features that they have (eg. SparseFixedBitSet due to random write-access) but I'm thinking of removing WAH8DocIdSet and PForDeltaDocIdSet since RoaringDocIdSet also has the ability to inverse its encoding in the super-dense case (WAH8 and PForDelta were the only sets to have this ability until now) and tends to be faster to build and to advance.



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