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https://issues.apache.org/jira/browse/IMPALA-10228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tim Armstrong updated IMPALA-10228:
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Priority: Minor (was: Major)
> Avoid or codegen std::map comparisons in partitioned top-n
> ----------------------------------------------------------
>
> Key: IMPALA-10228
> URL: https://issues.apache.org/jira/browse/IMPALA-10228
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 4.0
> Reporter: Tim Armstrong
> Priority: Minor
> Labels: codegen, performance
>
> The partitioned top-n implementation currently uses std::map to store the
> heaps. We can't inline the tuple comparator easily because of the
> indirections in the standard library code.
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