Cheng Lian created SPARK-3294:
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Summary: Avoid boxing/unboxing when handling in-memory columnar
storage
Key: SPARK-3294
URL: https://issues.apache.org/jira/browse/SPARK-3294
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 1.0.2, 1.1.0
Reporter: Cheng Lian
Priority: Critical
When Spark SQL in-memory columnar storage was implemented, we tried to avoid
boxing/unboxing costs as much as possible, but {{javap}} shows that there still
exist code that involves boxing/unboxing on critical paths due to type erasure,
especially methods of sub-classes of {{ColumnType}}. Should eliminate them
whenever possible for better performance.
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