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https://issues.apache.org/jira/browse/IGNITE-7986?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16406349#comment-16406349
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Dmitriy Pavlov commented on IGNITE-7986:
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[~VitaliyB], thank you for explanation and benchmark information.
According your microbenchmark results this change seems to me as very useful
contribution.
> GridPartitionStateMap.entrySet() optimization.
> ----------------------------------------------
>
> Key: IGNITE-7986
> URL: https://issues.apache.org/jira/browse/IGNITE-7986
> Project: Ignite
> Issue Type: Improvement
> Reporter: Vitaliy Biryukov
> Assignee: Vitaliy Biryukov
> Priority: Major
> Attachments: GridPartitionStateMapBench.java, fullResult.txt
>
>
> GridPartitionStateMap based on BitSet. And the size of a BitSet depends on
> the maximum key element, and not on the number of elements.
> Just using the "BitSet.nextSetBit" method, will improve the performance of
> the iterator for big clusters or caches with a large number of partitions.
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