Where did lib64 directories come from

[Ingemar Nilsson]

sos at zjod.net (Steve Siegfried) writes:

> Is there any real advantage to using either 32 bit or 64 bit binaries
> on a 64 bit CPU?   For most programs, not really, mostly since very few
> folks have anywhere near 32 bits worth (let alone more)  of real memory.

More memory isn't the only advantage of using x86-64-compiled binaries over
using i386-compiled binaries. x86-64 also has twice as many registers, both
general-purpose and XMM (SSE), as i386. This means that the program can
keep more variables in registers at once, without having to swap them in
and out of memory.

Regards
Ingemar