#!/usr/bin/perl -w -- 
use strict;
use Benchmark 'cmpthese';
cmpthese(-3,{
   'perloop' => sub {
        my @array;
        for(0..49) {
            $array[$_]=50;
        }
        return();
   },
   'c-loop' => sub {
        my @array;
        for(my $i=0; $i<50; $i++) {
            $array[$i]=50;
        }
        return();
   },
   'rangeslice' => sub {
        my @array;
        @array[0..49] = (50) x 50;
        return();
   },
   'literalslice' => sub {
        my @array;
        @array[
0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,
21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,
38,39,40,41,42,43,44,45,46,47,48,49
        ] = (
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50
        );
        return();
   },
   'literalassign' => sub {
        my @array = (
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50,50,50,50,50,50,
50,50,50,50,50,50
        );
        return();
   },

   'repeatassign' => sub {
        my @array = (50) x 50;
        return();
   },

});
__END__
Benchmark: running c-loop, literalassign, literalslice, perloop, range
+slice, repeatassign, each for at least 3 CPU seconds...
       c-loop:  3 wallclock secs ( 3.39 usr +  0.00 sys =  3.39 CPU) @
+ 31973.75/s (n=108391)
literalassign:  4 wallclock secs ( 3.09 usr +  0.00 sys =  3.09 CPU) @
+ 122232.14/s (n=378064)
 literalslice:  4 wallclock secs ( 3.00 usr +  0.00 sys =  3.00 CPU) @
+ 92383.00/s (n=277149)
      perloop:  4 wallclock secs ( 3.00 usr +  0.00 sys =  3.00 CPU) @
+ 40371.54/s (n=121155)
   rangeslice:  3 wallclock secs ( 3.02 usr +  0.00 sys =  3.02 CPU) @
+ 65742.71/s (n=198280)
 repeatassign:  4 wallclock secs ( 3.19 usr +  0.00 sys =  3.19 CPU) @
+ 129130.18/s (n=411667)
                  Rate c-loop perloop rangeslice literalslice literala
+ssign repeatassign
c-loop         31974/s     --    -21%       -51%         -65%         
+ -74%         -75%
perloop        40372/s    26%      --       -39%         -56%         
+ -67%         -69%
rangeslice     65743/s   106%     63%         --         -29%         
+ -46%         -49%
literalslice   92383/s   189%    129%        41%           --         
+ -24%         -28%
literalassign 122232/s   282%    203%        86%          32%         
+   --          -5%
repeatassign  129130/s   304%    220%        96%          40%         
+   6%           --
[download]

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