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https://issues.apache.org/jira/browse/IGNITE-2579?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15154148#comment-15154148
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Ilya Lantukh commented on IGNITE-2579:
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In our benchmarks HashSet size is always equal to 1. I presume this is also
true for the most typical use-cases.
Adjusted constructor parameters accordingly.
> Investigate HashMap.Node[] allocations from GridCacheMvccManager$3
> ------------------------------------------------------------------
>
> Key: IGNITE-2579
> URL: https://issues.apache.org/jira/browse/IGNITE-2579
> Project: Ignite
> Issue Type: Sub-task
> Components: cache
> Affects Versions: 1.5.0.final
> Reporter: Vladimir Ozerov
> Assignee: Ilya Lantukh
> Fix For: 1.6
>
>
> *Problem*
> See GridCacheMvccManager.addFuture() method. We create a weird HashSet there
> with internal table size == 5. Can we have something more efficient here?
> *Proposed solution*
> Need to run single get-put benchmarks and check usual size of this
> collection. If it is often equal to 1, then instead of allocating the whole
> collection, we'd better to have a singleton first and expand to collection if
> there are more elements.
> Please pay attention that collection usually used as monitor in some
> synchronized blocks.
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