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https://issues.apache.org/jira/browse/IGNITE-2329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15132104#comment-15132104
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Vladimir Ozerov commented on IGNITE-2329:
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I separated Yakov's NIO fix into dedicated branch - ignite-2329. Significant
drop in allocations is observed. Waiting for TC.
> Get rid of Iterator for selected keys in NIO server
> ---------------------------------------------------
>
> Key: IGNITE-2329
> URL: https://issues.apache.org/jira/browse/IGNITE-2329
> Project: Ignite
> Issue Type: Sub-task
> Components: general
> Reporter: Alexey Goncharuk
> Assignee: Yakov Zhdanov
> Fix For: 1.6
>
>
> Every time a NIO thread wakes up on selected keys, a new iterator is created
> since selector returns a Set.
> There is a technique that makes it possible to avoid new iterator creation,
> that is implemented in Netty.
> For details, see io.netty.channel.nio.NioEventLoop and
> processSelectedKeysOptimized method.
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