If it never has more than 10 files, who cares? If it's fast enough, don't worry. if you need more speed, benchmark and profile.
Except that sorting N values involves N log N to N^2 comparisons,
and if each comparison involves 2 stat, at 10 ms each, it
does waste system resources. Schwartzian Transform -
creating a hash which associates the stat time with the
file name - involves only N stats, and would be economical.
If files are not going to change, keep a list of known
files in a hash, and obtain a list of eligible files. If
there are any new files, stat only the ones you don't already know about.
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