[issue33671] Efficient zero-copy for shutil.copy* functions (Linux, OSX and Win)

[Giampaolo Rodola']

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

Yes, I tried changing benchmarks order and zero-copy variants are always faster. As for instantaneous CoW copy, it is debatable. E.g. "cp" command does not do it by default:   
https://unix.stackexchange.com/questions/80351/why-is-cp-reflink-auto-not-the-default-behaviour
I think shutil should follow the same lead, and perhaps provide a cow=bool argument in the future.

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