GH-125413: pathlib.Path.copy(): get common metadata keys only once
#125990
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… once Improve `pathlib._abc.PathBase.copy()` (which provides `Path.copy()`) by fetching operands' supported metadata keys up-front, rather than once for each path in the tree. This prepares the way for using `os.DirEntry` objects in `copy()`.
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Improve
pathlib._abc.PathBase.copy()(which providesPath.copy()) by fetching operands' supported metadata keys up-front, rather than once for each path in the tree.This prepares the way for using
os.DirEntryobjects incopy().os.DirEntryobjects from pathlib #125413