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Posted to issues@spark.apache.org by "Josh Rosen (JIRA)" <ji...@apache.org> on 2016/06/03 23:03:59 UTC

[jira] [Created] (SPARK-15762) Cache Metadata.hashCode and use a singleton for Metadata.empty

Josh Rosen created SPARK-15762:
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             Summary: Cache Metadata.hashCode and use a singleton for Metadata.empty
                 Key: SPARK-15762
                 URL: https://issues.apache.org/jira/browse/SPARK-15762
             Project: Spark
          Issue Type: Bug
          Components: SQL
            Reporter: Josh Rosen
            Assignee: Josh Rosen


In Spark SQL we should cache Metadata.hashCode and use a singleton for Metadata.empty since calculating empty metadata hashCodes appears to be an bottleneck according to certain profiler results.



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