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               Rate  recursive recursive2       eval  iterative   list
+util
recursive    1244/s         --        -4%       -68%       -97%      -
+100%
...
eval         3930/s       216%       203%         --       -91%       
+-99%
iterative   42708/s      3332%      3192%       987%         --       
+-85%
listutil   281788/s     22544%     21622%      7071%       560%       
+  --

use warnings;
use strict;
...
    listutil =>
        sub { sum(@array) == $expect or die },
});