#!/usr/bin/perl
use warnings;
use strict;
use Benchmark; 

#Outputs:
#Benchmark: timing 1000000 iterations of c-loop, perl-loop...
# c-loop:  5 wallclock secs ( 5.64 usr +  0.02 sys =  5.66 CPU) 
            @ 176678.45/s (n=1000000)
# perl-loop:  3 wallclock secs ( 3.58 usr +  0.01 sys =  3.59 CPU) 
           @ 278551.53/s (n=1000000)


timethese(1000000, {

'c-loop' => sub {

 for (my $i = 0; $i <= 100; $i += 5) {
   #print("$i ");
  }

}, 

'perl-loop' => sub {

  for (0..20){
    # print 5 * $_." ";
  }
 
 },

});