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https://issues.apache.org/jira/browse/SPARK-13185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin resolved SPARK-13185.
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Resolution: Fixed
Assignee: Carson Wang
Fix Version/s: 2.0.0
> Improve the performance of DateTimeUtils.StringToDate by reusing Calendar
> objects
> ---------------------------------------------------------------------------------
>
> Key: SPARK-13185
> URL: https://issues.apache.org/jira/browse/SPARK-13185
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Carson Wang
> Assignee: Carson Wang
> Priority: Minor
> Fix For: 2.0.0
>
>
> It is expensive to create java Calendar objects in each method of
> DateTimeUtils. We can reuse the objects to improve the performance. In one of
> my Sql queries which calls StringToDate many times, the duration of the stage
> improved from 1.6 minutes to 1.2 minutes.
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