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os: improve performance of hostname and homedir

Rodrigo Muino Tomonari requested to merge github/fork/Uzlopak/os-cache-homedir into main

This PR improves the performance of the homedir and hostname.

                          confidence improvement accuracy (*)   (**)  (***)
os/hostname.js n=1000000        ***     37.28 %       ±1.16% ±1.54% ±2.01%

Be aware that when doing many comparisons the risk of a false-positive result increases.
In this case, there are 1 comparisons, you can thus expect the following amount of false-positive results:
  0.05 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.01 false positives, when considering a   1% risk acceptance (**, ***),
  0.00 false positives, when considering a 0.1% risk acceptance (***)
                        confidence improvement accuracy (*)   (**)  (***)
os/homedir.js n=1000000        ***     60.71 %       ±4.49% ±6.00% ±7.88%

Be aware that when doing many comparisons the risk of a false-positive result increases.
In this case, there are 1 comparisons, you can thus expect the following amount of false-positive results:
  0.05 false positives, when considering a   5% risk acceptance (*, **, ***),
  0.01 false positives, when considering a   1% risk acceptance (**, ***),
  0.00 false positives, when considering a 0.1% risk acceptance (***)
                      confidence improvement accuracy (*)   (**)  (***)
os/uptime.js n=100000        ***      0.69 %       ±0.19% ±0.26% ±0.33%

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

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