#!/usr/local/bin/perl

use Benchmark;
use strict;

my $count = 10000;
my @lists = map { [chr($_+65),chr($_+66),chr($_+67),chr($_+68) ] } 0..22;

open(FH1,'>/tmp/x') or die "$!\n";
open(FH2,'>/tmp/y') or die "$!\n";

timethese ($count, { 'pack' => '&use_pack', 'printf' => '&use_printf' } );

sub use_pack {
    foreach (@lists) {
        print FH1 pack('A20A180A200A350',@{$_});
    }
}

sub use_printf {
    foreach (@lists) {
        printf FH2 "%-20s%-180s%-200s%-350s", @{$_} ;
    }

}