[OT] GCC vs Intel C++ compiler benchmark

[Claus Fischer]

On Sun, Jan 27, 2002 at 01:45:16PM +0100, Florian Weimer wrote:
: A few years ago, I noticed the following difference: The Microsoft C
: library on Win32 switches the FPU to 64 bit precision.  GNU/Linux uses
: 80 bit precision, which used to be slower.  Depending on the working
: set, VM performance can affect benchmark results, too.  For example,
: Windows 95 taints the first-level data cache of the processor
: regularly, measurably decreasing performance.

The FPU settings could indeed help explain it. I doubt that the VM
would work against Linux in a CPU bound benchmark (as long as no
swapping or extensive scheduling between multiple jobs is done).

Claus

-- 
Claus Fischer <claus.fischer@clausfischer.com>
http://www.clausfischer.com/