Gopal V created HIVE-18866:
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Summary: Semijoin: Implement a Long -> Hash64 vector fast-path
Key: HIVE-18866
URL: https://issues.apache.org/jira/browse/HIVE-18866
Project: Hive
Issue Type: Bug
Components: Vectorization
Reporter: Gopal V
A significant amount of CPU is wasted with JMM restrictions on byte[] arrays.
To transform from one Long -> another Long, this goes into a byte[] array,
which shows up as a hotspot.
!perf-hash64-long.png!
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