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Posted to issues@arrow.apache.org by "Micah Kornfield (JIRA)" <ji...@apache.org> on 2019/07/03 04:15:00 UTC

[jira] [Resolved] (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 ]

Micah Kornfield resolved ARROW-5814.
------------------------------------
       Resolution: Fixed
    Fix Version/s: 1.0.0

Issue resolved by pull request 4765
[https://github.com/apache/arrow/pull/4765]

> [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
>             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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