Shai Erera created LUCENE-5321:
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Summary: Remove Facet42DocValuesFormat
Key: LUCENE-5321
URL: https://issues.apache.org/jira/browse/LUCENE-5321
Project: Lucene - Core
Issue Type: Improvement
Components: modules/facet
Reporter: Shai Erera
The new DirectDocValuesFormat is nearly identical to Facet42DVF, except that it
stores the addresses in direct int[] rather than PackedInts. On LUCENE-5296 we
measured the performance of DirectDVF vs Facet42DVF and it improves perf for
some queries and have negligible effect for others, as well as RAM consumption
isn't much worse. We should remove Facet42DVF and use DirectDVF instead.
I also want to rename Facet46Codec to FacetCodec. There's no need to refactor
the class whenever the default codec changes (e.g. from 45 to 46) since it
doesn't care about the actual Codec version underneath, it only overrides the
DVF used for the facet fields. FacetCodec should take the DVF from the app (so
e.g. the facet/ module doesn't depend on codecs/) and be exposed more as a
utility Codec rather than a real, versioned, Codec.
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