Wes McKinney created ARROW-6381:
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Summary: [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
Fix For: 0.15.0
{{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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