64-bit Linux (Debian) running on a Intel Xeon E5450 @ 3.00GHz

nimrod:~$ rm vec_bench vec_bench.o
nimrod:~$ make
gcc-4.3 -c -O2 -msse -msse2 -W -Wall -Wextra  -DALIGNED vec_bench.c -o vec_bench.o
vec_bench.c: In function âaccurate_timeâ:
vec_bench.c:48: warning: implicit declaration of function âgettimeofdayâ
vec_bench.c: In function âmainâ:
vec_bench.c:290: warning: control reaches end of non-void function
gcc-4.3 vec_bench.o -o vec_bench
nimrod:~$ ./vec_bench
Testing methods...
All OK

        Problem size                  Simple                  Intrin                  Inline
                 100    2.79e+02 cycles (100.0%)        9.90e+01 cycles ( 35.5%)        2.25e+02 cycles ( 80.6%)
                1000    2.53e+03 cycles (100.0%)        7.20e+02 cycles ( 28.5%)        2.04e+03 cycles ( 80.8%)
               10000    2.55e+04 cycles (100.0%)        1.53e+04 cycles ( 60.2%)        2.01e+04 cycles ( 78.8%)
              100000    2.61e+05 cycles (100.0%)        1.56e+05 cycles ( 59.5%)        2.01e+05 cycles ( 77.0%)
             1000000    1.09e+07 cycles (100.0%)        7.42e+06 cycles ( 68.3%)        9.80e+06 cycles ( 90.2%)
            10000000    1.11e+08 cycles (100.0%)        1.03e+08 cycles ( 92.7%)        1.08e+08 cycles ( 97.2%)

nimrod:~$ rm vec_bench vec_bench.o
nimrod:~$ make
gcc-4.3 -c -O3 -msse -msse2 -W -Wall -Wextra  -DALIGNED vec_bench.c -o vec_bench.o
vec_bench.c: In function âaccurate_timeâ:
vec_bench.c:48: warning: implicit declaration of function âgettimeofdayâ
vec_bench.c: In function âmainâ:
vec_bench.c:290: warning: control reaches end of non-void function
gcc-4.3 vec_bench.o -o vec_bench
nimrod:~$ ./vec_bench
Testing methods...
All OK

        Problem size                  Simple                  Intrin                  Inline
                 100    1.80e+02 cycles (100.0%)        9.90e+01 cycles ( 55.0%)        2.25e+02 cycles (125.0%)
                1000    1.55e+03 cycles (100.0%)        7.20e+02 cycles ( 46.5%)        2.03e+03 cycles (131.4%)
               10000    1.69e+04 cycles (100.0%)        1.52e+04 cycles ( 90.3%)        2.01e+04 cycles (119.1%)
              100000    1.71e+05 cycles (100.0%)        1.56e+05 cycles ( 90.8%)        2.02e+05 cycles (117.6%)
             1000000    1.02e+07 cycles (100.0%)        7.43e+06 cycles ( 72.8%)        9.81e+06 cycles ( 96.1%)
            10000000    1.04e+08 cycles (100.0%)        1.03e+08 cycles ( 98.9%)        1.08e+08 cycles (103.8%)