Dear Monks, I recently read this post on shuffling arrays. I put together a couple other methods of shuffling using the Knuth shuffle. 
#! /usr/local/bin/perl
use strict;
use warnings;

my @randomarray = ( 0 .. 100 );

my $sub1 = sub {
        for(my $j, my $x, my $i = scalar @randomarray; $i;$j = int(ran
+d($i)), $x = $randomarray[--$i], $randomarray[$i] = $randomarray[$j],
+ $randomarray[$j]
= $x){
        }
};

my $sub2 = sub {
        my $i = scalar @randomarray;
        while ($i){
                my $j = int(rand($i));
                my $x = $randomarray[--$i]; #next value
                $randomarray[$i] = $randomarray[$j]; #next value = ran
+dom value
                $randomarray[$j] = $x; #current random value = next va
+lue.
        }
};

use Benchmark;

timethese(100000, {
                'Sub 1' => $sub1,
                'Sub 2' => $sub2,
        });

[download]
I was wondering if I could get a little help to obfuscate the above benchmarks a little more? In true Perl style, such as perhaps using map or other better ways to iterate through the algorithm to help it gain even a better edge. Here are my benchmark results: 
Benchmark: timing 100000 iterations of Sub 1, Sub 2...
     Sub 1: 28 wallclock secs (27.37 usr +  0.00 sys = 27.37 CPU) @ 36
+54.01/s (n=100000)
     Sub 2: 40 wallclock secs (32.25 usr +  0.00 sys = 32.25 CPU) @ 31
+00.78/s (n=100000)

[download]

It looks like using the For loop is a bit faster. Thank you for any comments in advance.

Cheers!
s;;5776?12321=10609$d=9409:12100$xx;;s;(\d*);push @_,$1;eg;map{print chr(sqrt($_))."\n"} @_;

In reply to Array Shuffle by logie17

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