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Posted to issues@arrow.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/07/01 09:42:00 UTC

[jira] [Updated] (ARROW-5814) [Java] Implement a HashMap for DictionaryEncoder

     [ https://issues.apache.org/jira/browse/ARROW-5814?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated ARROW-5814:
----------------------------------
    Labels: pull-request-available  (was: )

> [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
>            Priority: Minor
>              Labels: pull-request-available
>
> 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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