[Gllug] Fileserver hardware advice

Martin A. Brooks martin at hinterlands.org
Mon Mar 19 23:04:41 UTC 2007


t.clarke wrote:
> Interesting point about 64-bit code execution speed!
>
> I always assumed in my ignorance that 64-bit CPUs were optimised for 64-bit
> instructions, but would execute 32bit instructions not quite so well and thus
> slower.  On the other hand I also assumed that 64bit code being bigger would
> take longer to load from main memory into the on-chip cache when required for
> execution -  whether this is true or material or not I have no idea !
>
> Its totally academic for me at the moment as I have no need for huge address
> spaces.  A fast 32bit CPU does absolutely fine :)
>   

So, working this logic backwards, an 8 bit CPU would be 4 times faster 
than the 32 bit one that works just fine for you.


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