Benchmark: running normal, preAssign for at least 100 CPU seconds...
    normal: 106 wallclock secs (104.92 usr +  0.01 sys = 104.93 CPU) @ 67924.06/s (n=7127272)
 preAssign: 104 wallclock secs (105.09 usr +  0.01 sys = 105.10 CPU) @ 50860.65/s (n=5345454)
Pre: 33/64
Normal: 33/64