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https://issues.apache.org/jira/browse/ARROW-9080?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17129369#comment-17129369
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Antoine Pitrou commented on ARROW-9080:
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Uh, I think we discussed this already... and when I asked the question, the
consensus was that we wanted to avoid shared_ptr cost where not required. This
is why that function returns {{Result<unique_ptr<Buffer>>}}.
> [C++] arrow::AllocateBuffer returns a Result<unique_ptr<Buffer>>
> ----------------------------------------------------------------
>
> Key: ARROW-9080
> URL: https://issues.apache.org/jira/browse/ARROW-9080
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Fix For: 1.0.0
>
>
> This seemed counterintuitive to me since using Buffers almost anywhere
> requires a shared_ptr<Buffer>
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