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https://issues.apache.org/jira/browse/ARROW-5814?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Micah Kornfield updated ARROW-5814:
-----------------------------------
Component/s: Java
> [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
> Components: Java
> Reporter: Ji Liu
> Assignee: Ji Liu
> Priority: Minor
> Labels: pull-request-available
> Fix For: 1.0.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> 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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