use Socket;

sub gloryhackish {
  my @in = @addresses;
  my @sorted = map { $_ = inet_ntoa($_) }
    (sort (map {$_ = inet_aton($_)} @in));
  return @sorted;
}

__END__
Testing with 11818 addresses from my local blacklist:
Benchmark: running gloryhackish, grt, schwartzian for at least 10 CPU seconds...
gloryhackish: 11 wallclock secs (10.50 usr +  0.06 sys = 10.56 CPU) @ 22.25/s (n=235)
grt: 11 wallclock secs (10.57 usr +  0.03 sys = 10.60 CPU) @ 16.32/s (n=173)
schwartzian: 11 wallclock secs (11.02 usr +  0.02 sys = 11.04 CPU) @  8.42/s (n=93)
               Rate  schwartzian          grt gloryhackish
schwartzian  8.42/s           --         -48%         -62%
grt          16.3/s          94%           --         -27%
gloryhackish 22.3/s         164%          36%           --