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https://issues.apache.org/jira/browse/HIVE-16523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15987133#comment-15987133
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Sergey Shelukhin commented on HIVE-16523:
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Hmm.. is it a good idea to store hash ctx in every wrapper? it seems like 1000s
of refs of overhead.
> VectorHashKeyWrapper hash code for strings is not so good
> ---------------------------------------------------------
>
> Key: HIVE-16523
> URL: https://issues.apache.org/jira/browse/HIVE-16523
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-16523.01.patch, HIVE-16523.02.patch,
> HIVE-16523.patch
>
>
> Perf issues in vectorized gby on some string keys
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