Owen O'Malley created HIVE-11808:
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Summary: In ORC removing the dynamic dispatch for StringTreeReader
improves read by 10%
Key: HIVE-11808
URL: https://issues.apache.org/jira/browse/HIVE-11808
Project: Hive
Issue Type: Bug
Reporter: Owen O'Malley
Assignee: Owen O'Malley
When we introduced the dictionary/direct encodings for ORC, we made subclasses
of StringTreeReader named StringDirectTreeReader and StringDictionaryTreeReader
and introduce an additional dynamic dispatch in the inner loop. For tables with
a lot of string columns, removing that extra dispatch improves performance 10%.
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