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https://issues.apache.org/jira/browse/SPARK-28596?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16899834#comment-16899834
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Maxim Gekk commented on SPARK-28596:
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DateTimeBenchmark shows performance degradation up to 3 times on JDK
1.8.0_202-b08. It would be nice to try new implementation from the PR
https://github.com/apache/spark/pull/25329 on JDK11.
> Use Java 8 time API in date_trunc
> ---------------------------------
>
> Key: SPARK-28596
> URL: https://issues.apache.org/jira/browse/SPARK-28596
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.3
> Reporter: Maxim Gekk
> Priority: Minor
>
> The DateTimeUtils.truncTimestamp function can be fully implemented on top of
> Java 8 time API by adjusting ZonedDateTime to year, month, ..., seconds.
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