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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2016/12/23 17:35:58 UTC
[jira] [Commented] (SPARK-18991) Change
ContextCleaner.referenceBuffer to ConcurrentHashMap to make it faster
[ https://issues.apache.org/jira/browse/SPARK-18991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15773339#comment-15773339 ]
Apache Spark commented on SPARK-18991:
--------------------------------------
User 'zsxwing' has created a pull request for this issue:
https://github.com/apache/spark/pull/16390
> Change ContextCleaner.referenceBuffer to ConcurrentHashMap to make it faster
> ----------------------------------------------------------------------------
>
> Key: SPARK-18991
> URL: https://issues.apache.org/jira/browse/SPARK-18991
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Reporter: Shixiong Zhu
> Assignee: Shixiong Zhu
>
> Right now `ContextCleaner.referenceBuffer` is ConcurrentLinkedQueue and the time complexity of the `remove` action is O(n). It can be changed to use ConcurrentHashMap whose `remove` is O(1).
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