Pentium 100Linux 2 kernelgcc 2.7.0 -O3 -fomit-frame-pointerNo X server running, just a console, it makes the top speed jump from 151,000to 158,000 :-).options    des ecb/sassember   281000.00 177.1%16 r1 p    158667.40 100.0%16 r1 i    148471.70  93.6%16 r2 p    143961.80  90.7%16 r2 i    141689.20  89.3% 4 r1 i    140100.00  88.3% 4 r2 i    134049.40  84.5%16  c i    124145.20  78.2%16  c p    121584.20  76.6% 4  c i    118116.00  74.4% 4 r2 p    117977.90  74.4% 4  c p    114971.40  72.5% 4 r1 p    114578.40  72.2%-DDES_UNROLL -DDES_RISC1 -DDES_PTR