[HIVE-13255] FloatTreeReader.nextVector is expensive

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.0.1, 2.1.0
• Component/s: ORC
• Target Version/s: 2.0.1, 2.1.0
• Assignee: Prasanth Jayachandran
• Reporter: Prasanth Jayachandran
• Created: 10/Mar/16 01:40
• Updated: 21/Jun/16 15:44
• Resolved: 31/Mar/16 09:54

Description

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.