[jira] [Created] (SPARK-3294) Avoid boxing/unboxing when handling in-memory columnar storage

["Cheng Lian (JIRA)" <ji...@apache.org>]

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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