Adrien Grand created LUCENE-5993:
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Summary: Remove 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
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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