probably, the fastest way to sort IPv4 addresses in Perl is to use Sort::Key::IPv4: 
use Sort::Key::IPv4 qw(ipv4sort);

my @ip = qw(192.168.1.1 10.0.0.1 127.0.0.1 ...);
my @sorted = ipv4sort @ip;

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See also this node: Sorting IP addresses, lots of them, quickly.

In reply to Re: Sorting ip addresses quickly by salva
in thread Sorting ip addresses quickly by DrManhattan

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