GH-119518: Stop interning strings in pathlib#123356
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encukou merged 1 commit intopython:mainfrom Sep 2, 2024
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Remove `sys.intern(str(x))` calls when normalizing a path in pathlib. This
speeds up `str(Path('foo/bar'))` by about 10%.
vstinner
reviewed
Aug 28, 2024
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Thank you both! |
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Can this be back ported to 3.13? The interning causes memory usage to grow indefinitely on a free threaded build. |
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IMO it's too late to backport such change. cc @colesbury |
Contributor
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Maybe we could consider something like the following in 3.13: if sysconfig.get_config_var("Py_GIL_DISABLED"):
return drv, root, [x for x in rel.split(sep) if x and x != '.']
parsed = [sys.intern(str(x)) for x in rel.split(sep) if x and x != '.']
return drv, root, parsedIn other words, avoid interning in the free-threaded build, but don't change the behavior in the 3.13 default build. |
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Remove
sys.intern(str(x))calls when normalizing a path in pathlib. This speeds upstr(Path('foo/bar'))by about 10%.As mentioned in the issue, I've never been able to establish if/when string interning is useful in pathlib, nor that we're using it in the best way. It feels negligent to leave it in the code.