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From "Apache Spark (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (SPARK-26955) Align Spark's TimSort to JDK 11 TimSort
Date Thu, 21 Feb 2019 14:28:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-26955?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Apache Spark reassigned SPARK-26955:
------------------------------------

    Assignee:     (was: Apache Spark)

> Align Spark's TimSort to JDK 11 TimSort
> ---------------------------------------
>
>                 Key: SPARK-26955
>                 URL: https://issues.apache.org/jira/browse/SPARK-26955
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 2.4.0
>            Reporter: Maxim Gekk
>            Priority: Minor
>
> There are a couple differences in Spark's TimSort and JDK 11 TimSort:
> - Additional check in mergeCollapse introduced by http://hg.openjdk.java.net/jdk/jdk/rev/3a6d47df8239#l1.34
> - And increased constants for stackLen (http://hg.openjdk.java.net/jdk/jdk11/file/1ddf9a99e4ad/src/java.base/share/classes/java/util/TimSort.java#l184):
> The ticket aims to address the differences.



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