Weston Pace created ARROW-13387:
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Summary: [C++] [Dataset] The CSV file format currently always
disables multithreading
Key: ARROW-13387
URL: https://issues.apache.org/jira/browse/ARROW-13387
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Weston Pace
Previously the streaming CSV reader was a no-op and so it was a non-issue.
However, now that there is a parallel CSV reader it should be re-enabled.
https://github.com/apache/arrow/blob/81ff679c47754692224f655dab32cc0936bb5f55/cpp/src/arrow/dataset/file_csv.cc#L118
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