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https://issues.apache.org/jira/browse/LUCENE-6133?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Robert Muir resolved LUCENE-6133.
---------------------------------
       Resolution: Fixed
    Fix Version/s: Trunk
                   5.0

> improve default stored fields merge algorithm
> ---------------------------------------------
>
>                 Key: LUCENE-6133
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6133
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Robert Muir
>             Fix For: 5.0, Trunk
>
>         Attachments: LUCENE-6133.patch
>
>
> This is not very efficient today. 
> We should try to improve the default one and not rely so much upon bulk 
> merges. At the least we can use a specialized visitor, save some cpu, and 
> avoid creating so much garbage.
> Another pain point in default merge is all the string creation and unicode 
> encode/decoding back and forth. I don't tackle that here... but that would be 
> fantastic to fix in another issue.



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