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Posted to issues@spark.apache.org by "Reynold Xin (JIRA)" <ji...@apache.org> on 2015/08/04 01:19:04 UTC

[jira] [Created] (SPARK-9577) Surface concrete iterator types in various sort classes

Reynold Xin created SPARK-9577:
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             Summary: Surface concrete iterator types in various sort classes
                 Key: SPARK-9577
                 URL: https://issues.apache.org/jira/browse/SPARK-9577
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
            Reporter: Reynold Xin
            Assignee: Reynold Xin


We often return abstract iterator types in various sort-related classes (e.g. UnsafeKVExternalSorter). 

It is actually better to return a more concrete type, so the callsite uses that type and JIT can inline the iterator calls.




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