GeezerVison

                                                              confidence improvement accuracy (*)    (**)   (***)
 timers/timers-cancel-pooled.js n=5000000                                    -0.96 %       ±9.53% ±12.68% ±16.51%
 timers/timers-cancel-unpooled.js direction='end' n=1000000                   4.08 %       ±7.54% ±10.04% ±13.07%
 timers/timers-cancel-unpooled.js direction='start' n=1000000                -2.81 %       ±5.86%  ±7.80% ±10.16%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case there are 3 comparisons, you can thus
expect the following amount of false-positive results:
  0.15 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.03 false positives, when considering a   1% risk acceptance (**, ***),
  0.00 false positives, when considering a 0.1% risk acceptance (***)