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Posted to issues@spark.apache.org by "Davies Liu (JIRA)" <ji...@apache.org> on 2016/01/21 06:43:40 UTC

[jira] [Created] (SPARK-12950) Improve performance of BytesToBytesMap

Davies Liu created SPARK-12950:
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             Summary: Improve performance of BytesToBytesMap
                 Key: SPARK-12950
                 URL: https://issues.apache.org/jira/browse/SPARK-12950
             Project: Spark
          Issue Type: Improvement
          Components: SQL
            Reporter: Davies Liu


When benchmark generated aggregate with grouping keys, the profiling show that lookup in BytesToBytesMap took about 90% of the CPU time, we should optimize it.



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