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gh-136059: docs: pathlib: Mention that iterdir() is surprisingly not streaming #136060

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gh-136059: docs: pathlib: Mention that iterdir() is surprisingly not streaming #136060

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6 changes: 6 additions & 0 deletions Doc/library/pathlib.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -1328,6 +1328,12 @@ Reading directories
If the path is not a directory or otherwise inaccessible, :exc:`OSError` is
raised.

.. warning::
Despite its name and being a generator, this function currently
does not stream directory entries: It reads all directory
entries into memory before yielding the first entry.
If you need constant-memory iteration across a large number of
directory entries, use :func:`os.scandir` instead.

.. method:: Path.glob(pattern, *, case_sensitive=None, recurse_symlinks=False)

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