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  1. or download this
    use constant foo => 'bar';

...
}

crack(1, 2, 3);
  2. or download this
    use Benchmark qw(cmpthese);

...
           Rate ampersand    no_amp
ampersand 570/s        --      -39%
no_amp    939/s       65%        --
  3. or download this
    cmpthese(-1, {
    'ampersand' => '
...
           Rate ampersand    no_amp
ampersand 330/s        --      -61%
no_amp    849/s      157%        --