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{   
    my ($end, $curr, $result);
...
        $_factorial->();
    }
}

Timing factorial of 5
Benchmark: running dragonchild1, dragonchild2, lexical, recursion, typ
+eglob for at least 3 CPU seconds...
...
recursion     68036/s       151%       132%         --         -24%   
+      -36%
dragonchild2  89931/s       231%       206%        32%           --   
+      -15%
dragonchild1 106370/s       292%       262%        56%          18%   
+        --

Timing factorial of 15
Benchmark: running dragonchild1, dragonchild2, lexical, recursion, typ
+eglob for at least 3 CPU seconds...
...
recursion    16313/s       167%        139%         --         -36%   
+      -44%
dragonchild2 25319/s       314%        271%        55%           --   
+      -13%
dragonchild1 29099/s       376%        326%        78%          15%   
+        --

Timing factorial of 80
Benchmark: running dragonchild1, dragonchild2, lexical, recursion, typ
+eglob for at least 3 CPU seconds...
...
recursion    5047/s        169%        144%         --         -34%   
+      -43%
dragonchild2 7694/s        309%        272%        52%           --   
+      -13%
dragonchild1 8835/s        370%        327%        75%          15%   
+        --