dns: improve lookup performance by ~3%

[anonrig]

This change improves dns lookup performance by roughly 3%.

Referencing: #44627

                                                              confidence improvement accuracy (*)   (**)   (***)
dns/lookup-promises.js n=5000000 all='false' name='::1'                      -0.03 %       ±2.42% ±3.23%  ±4.22%
dns/lookup-promises.js n=5000000 all='false' name='127.0.0.1'                 0.01 %       ±2.77% ±3.69%  ±4.80%
dns/lookup-promises.js n=5000000 all='true' name='::1'                        0.29 %       ±1.67% ±2.23%  ±2.90%
dns/lookup-promises.js n=5000000 all='true' name='127.0.0.1'                  2.99 %       ±5.73% ±7.70% ±10.16%
dns/lookup.js n=5000000 all='false' name='::1'                                0.37 %       ±0.86% ±1.14%  ±1.49%
dns/lookup.js n=5000000 all='false' name='127.0.0.1'                         -0.21 %       ±0.79% ±1.05%  ±1.37%
dns/lookup.js n=5000000 all='true' name='::1'                                 0.51 %       ±0.93% ±1.24%  ±1.61%
dns/lookup.js n=5000000 all='true' name='127.0.0.1'                          -0.50 %       ±0.89% ±1.18%  ±1.55%

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 (***)
`

[nodejs-github-bot]

Review requested:

• @nodejs/net

[mscdex]

I think you're misinterpreting the benchmark comparison output here. You should be looking for repeatable results with *** in the confidence column to ensure that this is indeed an improvement.

[Gordapanela]

Review requested:

• @ide /net

[anonrig]

You're definitely right. I totally missed it. I'm closing the pull request until I find a better improvement. Thanks!