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https://issues.apache.org/jira/browse/SPARK-31439?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-31439.
---------------------------------
Fix Version/s: 3.0.0
Resolution: Fixed
Issue resolved by pull request 28205
[https://github.com/apache/spark/pull/28205]
> Perf regression of fromJavaDate
> -------------------------------
>
> Key: SPARK-31439
> URL: https://issues.apache.org/jira/browse/SPARK-31439
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Maxim Gekk
> Assignee: Maxim Gekk
> Priority: Major
> Fix For: 3.0.0
>
>
> DateTimeBenchmark shows the regression
> Spark 2.4.6-SNAPSHOT at the PR https://github.com/MaxGekk/spark/pull/27
> {code}
> ================================================================================================
> Conversion from/to external types
> ================================================================================================
> OpenJDK 64-Bit Server VM 1.8.0_242-8u242-b08-0ubuntu3~18.04-b08 on Linux
> 4.15.0-1063-aws
> Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz
> To/from java.sql.Timestamp: Best Time(ms) Avg Time(ms)
> Stdev(ms) Rate(M/s) Per Row(ns) Relative
> ------------------------------------------------------------------------------------------------------------------------
> From java.sql.Date 614 655
> 43 8.1 122.8 1.0X
> {code}
> Current master:
> {code}
> ================================================================================================
> Conversion from/to external types
> ================================================================================================
> OpenJDK 64-Bit Server VM 1.8.0_242-8u242-b08-0ubuntu3~18.04-b08 on Linux
> 4.15.0-1063-aws
> Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz
> To/from java.sql.Timestamp: Best Time(ms) Avg Time(ms)
> Stdev(ms) Rate(M/s) Per Row(ns) Relative
> ------------------------------------------------------------------------------------------------------------------------
> From java.sql.Date 1154 1206
> 46 4.3 230.9 1.0X
> {code}
> The regression is ~x2.
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