[issue33639] Use high-performance os.sendfile() in shutil.copy*

[Giampaolo Rodola']

Giampaolo Rodola' <g.rodola at gmail.com> added the comment:

Closing as duplicate of #33671.

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stage: resolved -> patch review

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue33639>
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