Actual benefits of amd64 over i386

[Wilhelm B. Kloke]

João Carlos Mendes Luís <jonny at jonny.eng.br> 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.