Reynold Xin created SPARK-9458:
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Summary: Avoid object allocation in prefix generation
Key: SPARK-9458
URL: https://issues.apache.org/jira/browse/SPARK-9458
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Reynold Xin
Assignee: Reynold Xin
In our existing sort prefix generation code, we use expression's eval method to
generate the prefix, which results in object allocation for every prefix.
We can use the specialized getters available on InternalRow directly to avoid
the object allocation.
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