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https://issues.apache.org/jira/browse/LUCENE-10170?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17429690#comment-17429690
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Michael Sokolov commented on LUCENE-10170:
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IIRC luceneutil does have some support for retrieving a stored field from the 
index, but it is not enabled for any of the tasks.

> Regression in stored fields compression in 9.0
> ----------------------------------------------
>
>                 Key: LUCENE-10170
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10170
>             Project: Lucene - Core
>          Issue Type: Bug
>            Reporter: Adrien Grand
>            Priority: Minor
>             Fix For: main (9.0)
>
>          Time Spent: 40m
>  Remaining Estimate: 0h
>
> One of the Elasticsearch benchmarks detected a regression that is attributed 
> to stored fields compression after moving to a 9.0 snapshot. I managed to 
> isolate it to the change done on LUCENE-7521. It looks like LZ4 relied 
> significantly on Direct16 for good performance, so replacing it with Packed64 
> degraded compression speed.



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