confidence improvement accuracy (*)   (**)  (***)
 async_hooks/gc-tracking.js method='trackingDisabled' n=1000000        ***      4.41 %       ±1.58% ±2.10% ±2.74%
 async_hooks/gc-tracking.js method='trackingEnabled' n=1000000         ***      3.44 %       ±1.83% ±2.44% ±3.19%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case there are 2 comparisons, you can thus
expect the following amount of false-positive results:
  0.10 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.02 false positives, when considering a   1% risk acceptance (**, ***),
  0.00 false positives, when considering a 0.1% risk acceptance (***)