# for i in $(seq 1 20); do time ./matrix_mult_18.o; done
       61.41 real        59.40 user         1.04 sys
       61.19 real        59.20 user         1.04 sys
       61.36 real        59.49 user         0.91 sys
       61.36 real        59.52 user         0.86 sys
       61.38 real        59.58 user         0.84 sys
       61.37 real        59.49 user         0.91 sys
       61.27 real        59.43 user         0.88 sys
       61.45 real        59.49 user         0.98 sys
       61.45 real        59.68 user         0.79 sys
       61.46 real        59.68 user         0.80 sys
       61.43 real        59.49 user         0.96 sys
       61.31 real        59.52 user         0.83 sys
       61.15 real        59.32 user         0.90 sys
       61.34 real        59.53 user         0.85 sys
       61.07 real        59.18 user         0.97 sys
       61.27 real        59.45 user         0.88 sys
       61.37 real        59.40 user         1.02 sys
       61.25 real        59.42 user         0.89 sys
       61.04 real        59.28 user         0.84 sys
       61.26 real        59.32 user         1.00 sys