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https://issues.apache.org/jira/browse/LUCENE-10062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17448020#comment-17448020
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ASF subversion and git services commented on LUCENE-10062:
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Commit 6ee69e06fbd147598b49a16aee89496ff072a0ef in lucene's branch 
refs/heads/main from Greg Miller
[ https://gitbox.apache.org/repos/asf?p=lucene.git;h=6ee69e0 ]

LUCENE-10062: Switch to numeric doc values for encoding taxonomy ordinals (#264)



> Explore using SORTED_NUMERIC doc values to encode taxonomy ordinals for 
> faceting
> --------------------------------------------------------------------------------
>
>                 Key: LUCENE-10062
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10062
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/facet
>            Reporter: Greg Miller
>            Assignee: Greg Miller
>            Priority: Minor
>          Time Spent: 15h 10m
>  Remaining Estimate: 0h
>
> We currently encode taxonomy ordinals using varint style packing in a binary 
> doc values field. I suspect there have been a number of improvements to 
> SortedNumericDocValues since taxonomy faceting was first introduced, and I 
> plan to explore replacing the custom binary format we have today with a 
> SORTED_NUMERIC type dv field instead.
> I'll report benchmark results and index size impact here.



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