$ perl bench_inside_outside.pl
             Rate  outside outside2   inside  inside2
outside  110902/s       --      -2%     -39%     -40%
outside2 113390/s       2%       --     -38%     -39%
inside   181595/s      64%      60%       --      -2%
inside2  186121/s      68%      64%       2%       --