Are there any filesystems that can actually record a meaningful ns
modification time?  I find discussions claiming this:

- XFS and EXT3: second precision
- EXT4: millisecond precision
- NTFS: 100ns precision
- APFS: 1 ns precision

But also notes that the precision is likely to exceed the accuracy by many
times on real systems.

On Mon, Dec 7, 2020 at 2:34 PM Mats Wichmann <m...@wichmann.us> wrote:

>
> there are stat fields now for ns precision, e.g. st_mtime now has an
> analogue st_mtime_ns.  But os.path didn't grow corresponding methods -
> there's an os.path.getmtime but not _ms. Was that intentional?  The
> wrappers in genericpath.py are trivial and arguably aren't particularly
> needed, but still curious...
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