run       base       test     diff
  1    6256858    6607958  +351100
  2    6226235    6610886  +384651
  3    6207331    6577539  +370208
  4    6249464    6621256  +371792
  5    6241428    6624078  +382650
  6    6198015    6562575  +364560
  7    6249789    6616179  +366390
  8    6203222    6600168  +396946
  9    6218137    6590031  +371894
 10    6208392    6604496  +396104
 11    6193770    6598038  +404268
 12    6251365    6633285  +381920
 13    6200598    6559126  +358528
 14    6238246    6561416  +323170
 15    6191406    6590354  +398948
 16    6216451    6575959  +359508
 17    6220150    6593338  +373188
 18    6186956    6537490  +350534
 19    6167470    6616736  +449266
 20    6204280    6583727  +379447

Result of  20 runs
==================
base (...6-64-vnni256) =    6216478  +/- 10877
test (...6-64-vnni512) =    6593232  +/- 11009
diff                   =    +376754  +/- 11282

speedup        = +0.0606
P(speedup > 0) =  1.0000

CPU: 10 x Intel(R) Xeon(R) w5-2445
Hyperthreading: on