Wierd, though the tail version gets relatively more efficient if you increase the recursion level: 
cmpthese( -10, {
        "normal" => sub { normal(500000) },
        "tail"   => sub {   tail(500000) },
        "faster" => sub { faster(500000) },
    }
);

[download]
       s/iter normal   tail faster
normal   2.26     --   -22%   -40%
tail     1.77    28%     --   -23%
faster   1.36    66%    30%     --

[download]
"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^2: Tail recursion using goto ⊂ (was: Re^3: Trinary Operator Semantics) by Joost
in thread Trinary Operator Semantics by hardburn

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