Re[2]: [gentoo-amd64] 32 or 64 for web server and mysql

[Leonid Eremin <leon.programmer@gmail.com>]

On AMD64 there's also number of named general-purpose registers is
increased from 8 to 16 - new capabilities for optimization :)

> On Fri, Jul 20, 2007 at 09:21:10PM +0800, P.V.Anthony wrote:
>> The reason for this questions is that there are some information on the
>> net that says that there is no much difference between them.
>> Is that true? Thought that 64bit is always better.

> Building a system 64-bit buys you:
>  - wider integers (so math with 64-bit integers is faster)
>  - wider pointers (so an application can have a *lot* more address space
>    allocated to it)
>  - bigger binaries and data structures (so more RAM consumed)
>  - future-proofing (in a few years, 32-bit hardware will not be
>    available new)

> There's no "better" and it's not inherently faster in any way.  As
> another poster said, most UNIX apps have been running 64-bit on other
> architectures (SPARC being the most common) for years, so compatibility
> isn't a big deal.

> Those are the points on which I base my 32/64 decisions.

> Dustin



-- 
С уважением,
 Leonid                          mailto:Leon.Programmer@gmail.com

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