#!/usr/bin/perl
use strict;
use warnings;
use Benchmark qw( cmpthese );

my $count = shift || 100000;
my @test_array = (0 .. 99);

sub map_bench 
{
	my $result = join(', ', map { '?' } @test_array);
}

sub x_bench 
{
	my $result = '?, ' x @test_array;
}

cmpthese($count, {
	map => \&map_bench, 
	x   => \&x_bench, 
});

__END__

Benchmark: timing 100000 iterations of map, x...
       map: 28 wallclock secs (27.94 usr +  0.00 sys = 27.94 CPU) @ 3578.97/s (n=100000)
         x:  1 wallclock secs ( 0.77 usr +  0.00 sys =  0.77 CPU) @ 129533.68/s (n=100000)
        Rate   map     x
map   3579/s    --  -97%
x   129534/s 3519%    --


##</code><code>##

my $result = ('?, ' x $#test_array) . '?'

##</code><code>##

my $result = join(', ', map { '?' } @test_array);