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use strict;
use warnings;
...
        },
    }
);

$ perl bench_inside_outside.pl
             Rate  outside outside2   inside  inside2
...
outside2 113390/s      26%       --     -25%     -39%
inside   151060/s      67%      33%       --     -19%
inside2  185735/s     106%      64%      23%       --