you'll probably see a bunch of different ways, including split .. here's one pure regex way:
open OUTFILE, ">out.txt";
open INFILE, "in.txt";
while(<INFILE>){
next unless /(\d{1,3})ms:(\d{1,3})ms:(\d{1,3})ms/;
print OUTFILE join(",", ($1, $2, $3) ), "\n";
}
close OUTFILE;
close INFILE;
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