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https://issues.apache.org/jira/browse/ARROW-3051?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16580258#comment-16580258
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Wes McKinney commented on ARROW-3051:
-------------------------------------
The issue is explained in the commit message. In most normal uses RVO should
avoid any calls to the copy constructor. However if we did:
{code}
Status s = $CODE;
// Inspect s in some way
RETURN_NOT_OK(s);
{code}
In such case, {{s}} would be copied
> [C++] Status performance optimization from Impala/Kudu
> ------------------------------------------------------
>
> Key: ARROW-3051
> URL: https://issues.apache.org/jira/browse/ARROW-3051
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Priority: Major
> Fix For: 0.11.0
>
>
> Just saw this patch, worth investigating:
> https://github.com/apache/impala/commit/ea615d1d8026dbe1cda3f5c2b048d210b2df435b
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