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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