Benchmark: running with, without, each for at least 10 CPU seconds...
      with: 10 wallclock secs (10.24 usr +  0.00 sys = 10.24 CPU) @ 20.40/s (n=209)
   without: 11 wallclock secs (10.40 usr +  0.01 sys = 10.41 CPU) @ 20.47/s (n=213)
          Rate    with without
with    20.4/s      --     -0%
without 20.5/s      0%      --