Ji Liu created ARROW-5814:
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Summary: [Java] Implement a <Object, int> HashMap for
DictionaryEncoder
Key: ARROW-5814
URL: https://issues.apache.org/jira/browse/ARROW-5814
Project: Apache Arrow
Issue Type: Improvement
Reporter: Ji Liu
Assignee: Ji Liu
As a follow-up of
[ARROW-5726|https://issues.apache.org/jira/browse/ARROW-5726]. Implement a
Map<Object, int> for DictionaryEncoder to reduce boxing/unboxing operations.
Benchmark:
DictionaryEncodeHashMapBenchmarks.testHashMap: avgt 5 31151.345 ± 1661.878
ns/op
DictionaryEncodeHashMapBenchmarks.testDictionaryEncodeHashMap: avgt 5
15549.902 ± 771.647 ns/op
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