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From: ke han <ke.han@redstarling.com>
Date: Mon, 28 Aug 2006 09:47:15 +0800
To: Wojciech Puchar <wojtek@tensor.3miasto.net>
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Cc: Martin Miedema <martin.miedema@gmail.com>, freebsd-questions@freebsd.org
Subject: Re: Intel 64bit / AMD 64 bit advantage
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On Aug 28, 2006, at 4:03 AM, Wojciech Puchar wrote:

>> 32 vs 64 bits does not give you any raw performance boost for most  
>> apps.  The
>
> yes it will. FreeBSD/amd64 works at least 10% faster than FreeBSD/ 
> i386 on athlon64 machine, when i386 version were recompiled for P4.  
> With default FreeBSD/i386 - it will be at least 30%.
>
> just because it's not just 64-bit addresses, but twice the  
> registers (r8-r15) allowing C compiler to generate more efficient  
> code.
>
> For now AMD64 is the fastest and cheapest architecture - at least  
> with AMD processors, not intel clones. (YES now intel makes clones  
> of AMD processors)

I stand corrected ;-)...This is good info, thanks.

However, to the original post, you will not see 10-30 % performance  
difference on your email or file sharing between an Intel Celeron and  
AMD Opteron.   These types of  apps are Disk and Network IO bound.   
Spend your money on redundancy/fail-over of hard drive and power  
supply.  Also choosing a well regarded NIC is important.

ke han

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