Actual benefits of amd64 over i386

Wilhelm B. Kloke wb at
Fri May 20 00:32:38 PDT 2005

João Carlos Mendes Luís <jonny at> schrieb:
>     Would these benefits outcome the losses caused by bigger binaries?
> Isn't it possible to use 64 bit registers in a 32 bit segment?  Just
> like i386 segments, where one could define the default register size...

I have made the experience, that the same piece of software (Algol68G
interpreter) has had about 10% performance gain in amd64 mode over i386
on the same machine. I don't have the figure about the increase in size
at hand.

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