[issue18219] csv.DictWriter is slow when writing files with large number of columns

[Mariatta Wijaya]

Changes by Mariatta Wijaya <mariatta.wijaya at gmail.com>:


Added file: http://bugs.python.org/file45170/issue18219v4.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18219>
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