Windows has a "GetSystemTime" resolution of 10-15 milliseconds, hence the results: http://msdn.microsoft.com/en-us/magazine/cc163996.aspx http://msdn.microsoft

Windows has a "GetSystemTime" resolution of 10-15 milliseconds, hence the results: http://msdn.microsoft.com/en-us/magazine/cc163996.aspx http://msdn.microsoft.com/en-us/magazine/cc163996.aspx Some comments found via Google indicate that this has changed to 1ms in Vista and higher, but I can't confirm this.