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#! /usr/bin/perl

use strict;
...
    });
    print "\n";
}

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For 10 elements:
           Rate deref  copy  CPAN
deref  672475/s    --  -15%  -67%
...
deref  653053/s    --  -15%  -68%
copy   771081/s   18%    --  -62%
CPAN  2045217/s  213%  165%    --