From: Jeff Garland (jeff_at_[hidden])
Date: 2004-07-25 21:11:20
On Mon, 26 Jul 2004 11:43:55 +1000, Matt Hurd wrote
> On Sat, 24 Jul 2004 11:24:39 +0100, John Maddock
> <john_at_[hidden]> wrote:
> > Just out of interest, what is the problem that prevents the date-time
> > library from implementing a microsecond clock using GetSystemTimeAsFileTime
> > on Win32?
> >
> > Thanks,
> >
> > John.
>
> The resolution supplied by GetSystemTimeAsFileTime may not be what
> you think. I get 10 milliseconds resolution out of my machine from the
> following code.
Yes, this is a problem -- but at least it is subsecond resolution which is
better than the second level resolution of the other clock type. So 'high
resolution clock' probably would be a better name with caveats by platform.
BTW, part of the test is to ensure that the clock values monotonically
increase with repeated sampling...
Jeff