From: Markus Koenig <markus@...>
Date: 2005-11-12T01:02:27+09:00
Subject: Re: Accurate Timing in ruby

Dennis Ranke wrote:

> Kero wrote:
>> So my PDA is more accurate than your machine (what OS is that?)
> 
> Windows XP.
> I think I got better accuracy on my iBook as well, so it's probably a
> limitation of the OS functions ruby uses to retreive the time on Windows.

True. There has been an MSDN magazine article about this (beware, I
have only skimmed it):

  http://msdn.microsoft.com/msdnmag/issues/04/03/HighResolutionTimer/

In short, Windows' clock is as accurate as 10 or 15 milliseconds,
depending on the hardware. The article also seems to show how to
implement a more precise timer in C++ - it should also work in Ruby,
but you might need to use Win32API.

Good luck,
Markus