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https://issues.apache.org/jira/browse/ARROW-10698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou updated ARROW-10698:
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Labels: good-first-issue (was: )
> [C++] Optimize union equality comparison
> ----------------------------------------
>
> Key: ARROW-10698
> URL: https://issues.apache.org/jira/browse/ARROW-10698
> Project: Apache Arrow
> Issue Type: Wish
> Components: C++
> Reporter: Antoine Pitrou
> Priority: Minor
> Labels: good-first-issue
>
> Currently, union array comparison in {{ArrayRangeEqual}} computes child
> equality over single union elements. This adds a large per-element comparison
> overhead. At least for sparse unions, it may be beneficial to detect
> contiguous runs of child ids and run child comparisons on entire runs.
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