Re: Moving from 32-bit to 64-bit Fedora

[Andrew Haley <aph@xxxxxxxxxx>]

On 06/11/2012 11:27 PM, Alan Cox wrote:
> Far from it. x32 is designed for performance. There are many applications
> where the additional space occupied by 64bit pointers is a measurable
> performance hit, but you still want to use the 64bit features of the CPU
> in all other respects.

It's pretty unusual.  Generally, the better ABI and supply of
registers is a win for gcc-compiled code .  The pessimal case seems to
be Python, which not only has 64-bit pointers but 64-bit ints on a
64-bit system.  I suspect that nine times out of ten 64-bit is a win.

Andrew.
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