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https://issues.apache.org/jira/browse/ARROW-6381?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wes McKinney resolved ARROW-6381.
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Resolution: Fixed
Issue resolved by pull request 5222
[https://github.com/apache/arrow/pull/5222]
> [C++] BufferOutputStream::Write is slow for many small writes
> -------------------------------------------------------------
>
> Key: ARROW-6381
> URL: https://issues.apache.org/jira/browse/ARROW-6381
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Assignee: Wes McKinney
> Priority: Critical
> Labels: pull-request-available
> Fix For: 0.15.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> {{Write}} calls into {{BufferOutputStream::Reserve}} which does a surprising
> amount of work. I suggest streamlining the implementation and adding
> benchmarks for the many-small-writes case
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