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https://issues.apache.org/jira/browse/FLINK-8227?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dian Fu resolved FLINK-8227.
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Resolution: Fixed
> Optimize the performance of SharedBufferSerializer
> --------------------------------------------------
>
> Key: FLINK-8227
> URL: https://issues.apache.org/jira/browse/FLINK-8227
> Project: Flink
> Issue Type: Bug
> Components: CEP
> Reporter: Dian Fu
> Assignee: Dian Fu
>
> Currently {{SharedBufferSerializer.serialize()}} will create a HashMap and
> put all the {{SharedBufferEntry}} into it. Usually this is not a problem. But
> we obverse that in some cases the calculation of hashCode may become the
> bottleneck. The performance will decrease as the number of
> {{SharedBufferEdge}} increases. For looping pattern {{A*}}, if the number of
> {{SharedBufferEntry}} is {{N}}, the number of {{SharedBufferEdge}} is about
> {{N * N}}.
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