#!/usr/bin/perl

use strict;
use warnings;

use Benchmark qw /cmpthese/;

our @test_array = (0 .. 99);
our (@array1, @array2);

cmpthese -2 => {
    map => '@::array1 = map {"?"} @::test_array',
    x   => '@::array2 = ("?") x @::test_array'
};

die "Benchmark failed" unless @test_array == @array1 &&
                              @test_array == @array2;

__END__

Benchmark: running map, x for at least 2 CPU seconds...
       map:  3 wallclock secs ( 2.09 usr +  0.03 sys =  2.12 CPU) @ 4608.49/s (n=9770)
         x:  2 wallclock secs ( 2.28 usr +  0.00 sys =  2.28 CPU) @ 14508.33/s (n=33079)
       Rate  map    x
map  4608/s   -- -68%
x   14508/s 215%   --