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https://issues.apache.org/jira/browse/OAK-464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13508730#comment-13508730
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Thomas Mueller commented on OAK-464:
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> that solution requires an extra roundtrip

If it's just a potential performance problem, I would rather defer it until it 
does turn out to be really a problem.

I see a bigger potential performance gain if oak-core would avoid calling 
branch / merge for the default case. If it wouldn't branch / merge, then the 
problem with rebase wouldn't even exist I guess.

                
> RootImpl.rebase() doesn't handle move operations correctly
> ----------------------------------------------------------
>
>                 Key: OAK-464
>                 URL: https://issues.apache.org/jira/browse/OAK-464
>             Project: Jackrabbit Oak
>          Issue Type: Bug
>            Reporter: Michael Dürig
>
> Doing {{RootImpl.rebase()}} causes moves to be changed to remove followed by 
> add. Which causes moves of large sub trees to become very expensive.

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