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https://issues.apache.org/jira/browse/SPARK-18256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-18256:
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    Assignee: Josh Rosen  (was: Apache Spark)

> Improve performance of event log replay in HistoryServer based on profiler 
> results
> ----------------------------------------------------------------------------------
>
>                 Key: SPARK-18256
>                 URL: https://issues.apache.org/jira/browse/SPARK-18256
>             Project: Spark
>          Issue Type: Improvement
>            Reporter: Josh Rosen
>            Assignee: Josh Rosen
>
> Profiling event log replay in the HistoryServer reveals Json4S control flow 
> exceptions and `Utils.getFormattedClassName` calls as significant 
> bottlenecks. Eliminating these halves the time to replay long event logs.



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