perl map vs for Benchmark

I want to test what’s the different between a map function and a for iteration with Perl is:

use strict;
use Benchmark qw(:all) ;
my @arr = (1..10);

print sub_map(@arr).$/;
print sub_for(@arr).$/;

cmpthese(-1, {
'sub_map'  => sub {sub_map(@arr)},
'sub_for'  => sub {sub_for(@arr)},

sub sub_map {
    return join",", map {$_ * 2} @_;
sub sub_for {
    for (@_){
        $_ = $_*2;

Our Benchmark result:

            Rate sub_for sub_map 
sub_for 129153/s      --    -10% 
sub_map 142717/s     11%      --

map is about 11% faster than a simple for loop.

2 thoughts on “perl map vs for Benchmark”

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