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https://issues.apache.org/jira/browse/LUCENE-3729?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13196328#comment-13196328
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Robert Muir commented on LUCENE-3729:
-------------------------------------

Interesting that it hurts sort and grouping so little... some questions:

* don't you think this should be 4.0's default sorted bytes implementation?
* alternatively, since this test hurts sort so little, maybe we could try 
  every n'th (e.g. 128) term going into the FST? So this would just be a
  'sort index' like the terms index, augmenting the existing sorted bytes 
  (you could still load em all up in ram for other purposes, like merging). 
  But we could avoid this (mostly) for sort and hopefully resolve most
  comparisons with the fst "index", maybe only rarely going to the 
DirectSource...

                
> Allow using FST to hold terms data in DocValues.BYTES_*_SORTED
> --------------------------------------------------------------
>
>                 Key: LUCENE-3729
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3729
>             Project: Lucene - Java
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>         Attachments: LUCENE-3729.patch, LUCENE-3729.patch
>
>


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