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cmaloneycmaloney
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Revert "gh-129005: _pyio.BufferedIO remove copy on readall (#129454)" (#129500)
This reverts commit e1c4ba9.
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‎Lib/_pyio.py‎

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@@ -1062,9 +1062,6 @@ def _read_unlocked(self, n=None):
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if chunk is None:
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return buf[pos:] or None
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else:
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# Avoid slice + copy if there is no data in buf
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if not buf:
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return chunk
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return buf[pos:] + chunk
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chunks = [buf[pos:]] # Strip the consumed bytes.
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current_size = 0

‎Misc/NEWS.d/next/Library/2025-01-29-00-00-01.gh-issue-129005.aV_3O8.rst‎

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