Re: [linux-audio-user] Academic question about AMD64 and audio

Joshua Boyd <jdboyd@email-addr-hidden> writes:

> On Tue, Aug 16, 2005 at 10:25:15AM +0100, Steve Harris wrote:
>
>> Unless you've got more than 3 gig of ram I doubt it will make much
>> difference. 32bit binaries are smaller, and hence faster, but there are a
>> couple of 64bit only instructions that the compiler might use that could
>> give some speed benefit.
>>
>> If you try it, why dont you measure the difference and tell us?
>>
>> Personally I'd be supprised if the 64bit version is measurably faster, but
>> I'm often supprised :)
>
> You wouldn't expect the increase in register count to make a fairly
> significant difference?

More registers generally help, but so does a smaller cache footprint.

Which matters more depends very much on exactly what you are doing.

-- 
  joq