The matter is subtle.

In terms of arithmetic, float and double should take about the same amount 
of time.

In terms of memory bandwidth, obviously arrays of doubles and such would 
move twice as slowly. But this is not likely to be a major factor.

Code full of doubles might swap more frequently into and out of cache, which 
would definitely slow things down. If there's a cost, this is probably where 
it is.

But in reality it's not clear in advance what will really happen, and that 
is why tests are a good idea.

Regards,
Mike

----- Original Message ----- 
From: "Iain Duncan" 
To: 
Sent: Monday, November 07, 2005 6:40 PM
Subject: Re: [Cs-dev] CVS Reorganization Request


>> Not at all. We are talking about 64 bit samples (double) instead of 32 
>> bit samples (float) internally, not 64 bit code for 64 bit processors.
>
>> I imagine Csound would sound exactly, or almost exactly, the same on a 64 
>> bit processor as on a 32 bit processor.
>
> Right, but would not a 64 bit processor likely have less overhead in 
> dealing with 64 bit samples then a 32 bit would? I imagined that it would 
> have to execute fewer instructions to do some of the 64 bit math.
>
> Iain
>
>
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