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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/08/29 22:03:20 UTC
[jira] [Commented] (SPARK-17301) Remove unused classTag field from
AtomicType base class
[ https://issues.apache.org/jira/browse/SPARK-17301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15447191#comment-15447191 ]
Apache Spark commented on SPARK-17301:
--------------------------------------
User 'JoshRosen' has created a pull request for this issue:
https://github.com/apache/spark/pull/14869
> Remove unused classTag field from AtomicType base class
> -------------------------------------------------------
>
> Key: SPARK-17301
> URL: https://issues.apache.org/jira/browse/SPARK-17301
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Josh Rosen
> Assignee: Josh Rosen
> Priority: Minor
>
> There's an unused {{classTag}} {{val}} in the {{AtomicType}} base class which is causing unnecessary slowness in deserialization because it needs to grab ScalaReflectionLock and create a new runtime reflection mirror. Removing this unused code gives a small but measurable performance boost in SQL task deserialization.
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