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https://issues.apache.org/jira/browse/PARQUET-1463?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved PARQUET-1463.
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Resolution: Fixed
Issue resolved by pull request 3036
[https://github.com/apache/arrow/pull/3036]
> [C++] Utilize revamped common hashing machinery for dictionary encoding
> -----------------------------------------------------------------------
>
> Key: PARQUET-1463
> URL: https://issues.apache.org/jira/browse/PARQUET-1463
> Project: Parquet
> Issue Type: Improvement
> Components: parquet-cpp
> Reporter: Wes McKinney
> Priority: Major
> Labels: pull-request-available
> Fix For: cpp-1.6.0
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> [~pitrou] has recently made some significant improvements to hashing /
> dictionary encoding machinery in Apache Arrow
> https://github.com/apache/arrow/commit/eaf8d32e5f292dca0aa5b5508041d5d39406224d
> parquet-cpp is using a custom hash table
> https://github.com/apache/arrow/blob/master/cpp/src/parquet/encoding-internal.h#L456
> It would be nice to utilize common hash table machinery if possible. We
> should of course make sure that such a change does not cause performance
> regressions (performance improved due to Antoine's patch, so perf may also
> get better on the Parquet write path)
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