Prasanth Jayachandran created HIVE-13255:
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Summary: FloatTreeReader.nextVector is expensive
Key: HIVE-13255
URL: https://issues.apache.org/jira/browse/HIVE-13255
Project: Hive
Issue Type: Bug
Components: ORC
Affects Versions: 2.1.0
Reporter: Prasanth Jayachandran
Assignee: Prasanth Jayachandran
Attachments: q1-bottleneck.png, q1-warm-perf-map.png
Some TPCDS queries on 1TB scale shows FloatTreeReader on profile samples. It is
most likely because of multiple branching and polymorphic dispatch in
FloatTreeReader.nextVector() implementation. See attached image for sampling
profile output.
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