====== CLI: parallel ======

  * https://medium.com/free-code-camp/how-to-supercharge-your-bash-workflows-with-gnu-parallel-53aab0aea141

<code bash>
parallel ::: "{cmd1}" "{cmd2}" "{cmd3}" ... "{cmdn}"

time parallel ::: "{cmd1}" "{cmd2}" "{cmd3}" ... "{cmdn}"
</code>