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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/05/02 09:29:06 UTC

[jira] [Commented] (SPARK-7323) Use insertAll instead of individual insert while merging combiners

    [ https://issues.apache.org/jira/browse/SPARK-7323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525110#comment-14525110 ] 

Apache Spark commented on SPARK-7323:
-------------------------------------

User 'mridulm' has created a pull request for this issue:
https://github.com/apache/spark/pull/5862

> Use insertAll instead of individual insert while merging combiners
> ------------------------------------------------------------------
>
>                 Key: SPARK-7323
>                 URL: https://issues.apache.org/jira/browse/SPARK-7323
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>            Reporter: Mridul Muralidharan
>
> Currently we invoke combiners.insert() for each tuple in Aggregator - which results in creation of an Iterator per tuple, and iterating over this iterator : instead, we can directly call insertAll to avoid the object creation, method invocation and iteration overhead - for each tuple when combiners are used.



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