confidence improvement accuracy (*)    (**)   (***)
dns/lookup.js n=5000000 all='false' name='::1'                                1.68 %       ±2.48%  ±3.30%  ±4.29%
dns/lookup.js n=5000000 all='false' name='127.0.0.1'                         -2.53 %       ±5.59%  ±7.46%  ±9.76%
dns/lookup.js n=5000000 all='true' name='::1'                                 0.05 %       ±2.09%  ±2.79%  ±3.63%
dns/lookup.js n=5000000 all='true' name='127.0.0.1'                          -2.49 %       ±4.02%  ±5.36%  ±7.00%
dns/lookup-promises.js n=5000000 all='false' name='::1'                      12.40 %      ±16.94% ±22.79% ±30.16%
dns/lookup-promises.js n=5000000 all='false' name='127.0.0.1'                 0.95 %       ±3.04%  ±4.04%  ±5.26%
dns/lookup-promises.js n=5000000 all='true' name='::1'                        5.62 %       ±9.65% ±12.97% ±17.15%
dns/lookup-promises.js n=5000000 all='true' name='127.0.0.1'                  0.88 %       ±4.24%  ±5.64%  ±7.35%

Be aware that when doing many comparisons the risk of a false-positive
result increases. In this case there are 8 comparisons, you can thus
expect the following amount of false-positive results:
 0.40 false positives, when considering a   5% risk acceptance (*, **, ***),
 0.08 false positives, when considering a   1% risk acceptance (**, ***),
 0.01 false positives, when considering a 0.1% risk acceptance (***)