Try replacing your calculation of @sorted with a Schwartzian Transform, something like this:
my @sorted=
map { $_->[0] }
sort { $a->[1] cmp $b->[1] }
map { [$_, ( / (\d*\.\d*) ms/ and $1 or 0 ) ] }
@data;
The part of the "expensive function" in merlyn's note is played by
/ (\d*\.\d*) ms/ and $1 or 0
which just returns the first (and in this case only) thing that looks like a ping time in the current string. (Update: I should mention the "or 0" is to make sure any lines with no valid ping time sort to the bottom.)
IMPORTANT NOTE: GrandFather++ is right about my absent-mindedly using "cmp" instead of "<=>". It should have been
my @sorted=
map { $_->[0] }
sort { $a->[1] <=> $b->[1] }
map { [$_, ( / (\d*\.\d*) ms/ and $1 or 0 ) ] }
@data;
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