[
https://issues.apache.org/jira/browse/SPARK-3196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Armbrust resolved SPARK-3196.
-------------------------------------
Resolution: Fixed
Both subtasks are complete
> Expression Evaluation Performance Improvement
> ---------------------------------------------
>
> Key: SPARK-3196
> URL: https://issues.apache.org/jira/browse/SPARK-3196
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Cheng Hao
>
> The expression id generations depend on a atomic long object internally,
> which will cause the performance drop dramatically in a multi-threading
> execution.
> I'd like to create 2 sub tasks(maybe more) for the improvements:
> 1) Reduce the expression tree object creation from the aggregation functions
> (min/max), as they will create expression trees for each single row.
> 2) Remove the id property from the TreeNode API.
> And remove the expression object creation as many as possible, where we have
> the expression evaluation. (I will create couple of subtask soon).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
