[PD] array copy speed test

geiger geiger at xdv.org
Tue Aug 1 15:55:28 CEST 2006


On Tue, 1 Aug 2006, Tim Blechmann wrote:
> > SIMD doesn't help in copying data. And in any case, introducing
> > platform dependend code is only advisable in cases where it really
> > matters.
>
> are you sure about this? not having benchmarks on this, i'm pretty sure,
> that moving 128 chunks of aligned memory is more efficient than moving 4
> 32 bit chunks of unaligned memory ...

I am not sure, but for me SIMD is a special assembler instruction set,
which is definitely not used when copying data. Maybe my misinterpretation.


Günter


>
> tim
>
> --
> tim at klingt.org    ICQ: 96771783
> http://www.mokabar.tk
>
> Avoid the world, it's just a lot of dust and drag and means nothing in
> the end.
>   Jack Kerouac
>




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