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https://issues.apache.org/jira/browse/ARROW-5343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17662364#comment-17662364
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Rok Mihevc commented on ARROW-5343:
-----------------------------------
This issue has been migrated to [issue
#21802|https://github.com/apache/arrow/issues/21802] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [C++] Consider using Buffer for transpose maps in DictionaryType::Unify
> instead of std::vector
> ----------------------------------------------------------------------------------------------
>
> Key: ARROW-5343
> URL: https://issues.apache.org/jira/browse/ARROW-5343
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.15.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> In the spirit of "track all the allocations", if dictionaries have
> non-trivial length, we may want to account for this memory more precisely.
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