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https://issues.apache.org/jira/browse/SOLR-5512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13835593#comment-13835593
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ASF subversion and git services commented on SOLR-5512:
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Commit 1546676 from [~rcmuir] in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1546676 ]
SOLR-5512: Optimize DocValuesFacets
> Optimize DocValuesFacets
> -------------------------
>
> Key: SOLR-5512
> URL: https://issues.apache.org/jira/browse/SOLR-5512
> Project: Solr
> Issue Type: Improvement
> Reporter: Robert Muir
> Attachments: SOLR-5512.patch
>
>
> This works well in the general case (esp with huge numbers of unique values),
> but the SortedSetDocValuesAccumulator in lucene/facets does the algorithm
> better for typical cases (smaller number of unique values wrt the size of the
> document set).
> In this case, it collects directly with per-segment local ords, then remaps
> as a second step. So this is a lot less remapping.
> Its too bad the code is separate at the moment, for now lets steal the
> heuristic.
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