New submission from Antoine Pitrou:
os.utime() uses the following code when times is None under Windows:
SYSTEMTIME now;
GetSystemTime(&now);
if (!SystemTimeToFileTime(&now, &mtime) ||
!SystemTimeToFileTime(&now, &atime)) {
PyErr_SetFromWindowsErr(0);
goto exit;
}
The problem is GetSystemTime has poor resolution (milliseconds). Instead, it
could call GetSystemTimeAsFileTime which writes directly into a FILETIME
structure, and potentially (?) has better resolution.
(according to a comment on MSDN, "Resolution on Windows 7 seems to be
sub-millisecond":
http://msdn.microsoft.com/en-us/library/windows/desktop/ms724397%28v=vs.85%29.aspx
)
----------
components: Library (Lib), Windows
messages: 203943
nosy: brian.curtin, larry, loewis, pitrou, steve.dower, tim.golden, tim.peters
priority: normal
severity: normal
status: open
title: os.utime(..., None) has poor resolution on Windows
type: behavior
versions: Python 3.4
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Python tracker <[email protected]>
<http://bugs.python.org/issue19727>
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