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https://issues.apache.org/jira/browse/LUCENE-5266?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13791316#comment-13791316
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Adrien Grand commented on LUCENE-5266:
--------------------------------------

This is very close to what I was thinking about, I'm looking forward to the 
performance tests!

> Optimization of the direct PackedInts readers
> ---------------------------------------------
>
>                 Key: LUCENE-5266
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5266
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-5266.patch, LUCENE-5266.patch
>
>
> Given that the initial focus for PackedInts readers was more on in-memory 
> readers (for storing stuff like the mapping from old to new doc IDs at 
> merging time), I never spent time trying to optimize the direct readers 
> although it could be beneficial now that they are used for disk-based doc 
> values.



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