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https://issues.apache.org/jira/browse/IGNITE-5872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16133265#comment-16133265
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Alexey Goncharuk commented on IGNITE-5872:
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[~agura] Can you please also take a look?

> Replace standard java maps for partition counters with more effective data 
> structures
> -------------------------------------------------------------------------------------
>
>                 Key: IGNITE-5872
>                 URL: https://issues.apache.org/jira/browse/IGNITE-5872
>             Project: Ignite
>          Issue Type: Improvement
>          Components: cache
>    Affects Versions: 2.1
>            Reporter: Alexey Goncharuk
>            Assignee: Alexey Goncharuk
>             Fix For: 2.2
>
>
> Currently we have map of Integer -> Tuple <Long, Long> which is passed for 
> each cache group. This is very inefficient as at causes a lot of boxes and 
> overheads in marshalling.
> This particular map can be replaced with a sorted primitive array.



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