Bruce Robbins created SPARK-37832:
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Summary: Orc struct serializer should look up field converters in
an array rather than a linked list
Key: SPARK-37832
URL: https://issues.apache.org/jira/browse/SPARK-37832
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.3.0
Reporter: Bruce Robbins
The OrcSerializer's struct converter uses an index to look up a field converter
in a linked list, resulting in a n*(n/2) average complexity per row (where n is
the field count).
Simply converting the linked list to an array brings performance gains,
especially for wide structs.
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