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Posted to issues@spark.apache.org by "Mridul Muralidharan (JIRA)" <ji...@apache.org> on 2015/05/02 09:27:05 UTC

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

Mridul Muralidharan created SPARK-7323:
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             Summary: 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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