timethis 100000: 5.43372 wallclock secs ( 5.43 usr +  0.00 sys =  5.43 CPU) @ 18419.60/s (n=100000)
timethis 100000: 1.66317 wallclock secs ( 1.67 usr +  0.00 sys =  1.67 CPU) @ 59916.12/s (n=100000)
timethis 100000: 5.62105 wallclock secs ( 5.59 usr +  0.00 sys =  5.59 CPU) @ 17905.10/s (n=100000)
timethis 100000: 1.7069 wallclock secs ( 1.70 usr +  0.00 sys =  1.70 CPU) @ 58788.95/s (n=100000)
M1A: 100000
M1B: 0
M2A: 100000
M2B: 0