[arch-general] аrch x86_64 and i686 performance comparison
sergeym at rmico.com
Wed Nov 11 11:11:02 EST 2009
The similar question most probably has been discussed many times, but I
really cannot find a clear answer. There are some obvious thinks like
64-bit addressing, but how about math calculations performance?
I've set up two identical virtual machines in vbox - one with Arch
x86_64 and another with Arch i686. I ran mencoder in both over the same
video and got the following figures:
x86_64: 43 sec
i686: 34 sec
which make x86_64 not so impressive ;)
Some time ago I read an article at AMD web site, they suggested using
their math libs for writing programs instead of standard ones. In such
a case a program with complex math involved can performs much better
(personally I haven't tried).
I'm just curious about other people's opinions on this subject.
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