----------- replace ---------------
 samples:       5490
 iterations:    18614151
 iterations hr:    18.6M
 run time:      5.001637424
 per iteration: 559.2802176 cycles
----------- pattern ---------------
 samples:       10330
 iterations:    65877981
 iterations hr:    65.9M
 run time:      5.001296988
 per iteration: 163.123483 cycles
