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    ...

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    printf "%d lines\n\n", scalar(@lines);
}
  2. or download this
    $ /opt/perl-5.20.3/bin/perl demo.pl

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duration walk2: 0.110 seconds
917504 lines
  3. or download this
    $ /opt/perl-5.26.1/bin/perl demo.pl

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duration walk2: 0.084 seconds
917504 lines