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Benchmark: timing 10000 iterations of goto, iterative, regular...
      goto: 19 wallclock secs (18.92 usr +  0.00 sys = 18.92 CPU) @ 52
+8.54/s (n=10000)
...
regular    436/s        --      -18%      -73%
goto       529/s       21%        --      -67%
iterative 1605/s      268%      204%        --

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use strict;
use Benchmark qw/ cmpthese /;
...

    goto &_gotohelp;
}