Wes McKinney created ARROW-1942:
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Summary: [C++] Hash table specializations for small integers
Key: ARROW-1942
URL: https://issues.apache.org/jira/browse/ARROW-1942
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Wes McKinney
Fix For: 0.9.0
There is no need to use a dynamically-sized hash table with uint8, int8, since
a fixed-size lookup table can be used and avoid hashing altogether
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