# for i in $(seq 1 5); do time ./matrix_mult_16.o; done
        4.22 real         3.86 user         0.28 sys
        4.21 real         3.86 user         0.26 sys
        4.21 real         3.88 user         0.26 sys
        4.22 real         3.89 user         0.25 sys
        4.20 real         3.87 user         0.26 sys