$ test.pl
            Rate sortcomp     hash sortjoin
sortcomp 20202/s       --      -0%     -58%
hash     20243/s       0%       --     -58%
sortjoin 48077/s     138%     137%       --

results: hash:diff sortjoin:diff sortcomp:diff

            Rate sortcomp     hash sortjoin
sortcomp 17857/s       --     -26%     -63%
hash     24213/s      36%       --     -50%
sortjoin 48544/s     172%     100%       --

results: hash:same sortjoin:same sortcomp:same