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Re: Sorry Re: which OS is faster for idl? [message #36805 is a reply to message #36804]

Thu, 23 October 2003 16:42

Karl Schultz
Messages: 341
Registered: October 1999

Senior Member

"R.G. Stockwell" <noemail@please.com> wrote in message
news:0RTlb.1644$4V5.19167@news.uswest.net...
>
>>> Yunxiang Zhang writes:
>>>
>>>> I happened to have a chance to run a time_test on a multiboot
machine
>>>> today. I did time_test, time_test2 & time_test3.
> Linux(gentoo,2.4.20-r6
>>>> kernel for P4) is 20~30% slower than XP. What do you guys think of
> this?
>>>> Any similar test has been done by anyone of you?
>
>
> A while ago I came to a similar conclusion. A 1.13 ghx win2000 laptop
> was faster than my 1.4 ghz linux AMD.
> There must be compiler optimizations available on the ms platforms
> that are not there on the other platfforms.
>

Agreed.

I ran the same tests on my dual-boot (XP/RedHat 8.0 2.4 kernel) and measured
linux to be about 15% slower.

Dual boot machines are great for tests like these because they keep a lot of
the variables constant and you therefore don't have to apply CPU clock speed
adjustments and wonder about differences between cache sizes, CPU
architecture, and other chipset issues.

I also compared the times on linux with and without an X server running and,
as expected, it made no significant difference.

So, it is a pretty fair bet that the quality of the compiled code,
efficiency of function parameter passing conventions, and speed of the
runtime library are probable contributors to the observed difference.

Karl

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[Message index]

		Re: Sorry Re: which OS is faster for idl? By: bryan.jones on Sun, 26 October 2003 12:06
		Re: Sorry Re: which OS is faster for idl? By: JD Smith on Fri, 24 October 2003 15:12
		Re: Sorry Re: which OS is faster for idl? By: Rick Towler on Fri, 24 October 2003 09:45
		Re: Sorry Re: which OS is faster for idl? By: Pertti Rautiainen on Fri, 24 October 2003 02:13
		Re: Sorry Re: which OS is faster for idl? By: JD Smith on Thu, 23 October 2003 17:40
		Re: Sorry Re: which OS is faster for idl? By: Karl Schultz on Thu, 23 October 2003 16:42
		Re: Sorry Re: which OS is faster for idl? By: R.G. Stockwell on Thu, 23 October 2003 10:00

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