$ test.pl
           Rate regex  hash
regex 1048218/s    --   -0%
hash  1048218/s    0%    --

$ test.pl
           Rate regex  hash
regex 1047449/s    --   -1%
hash  1059547/s    1%    --

$ test.pl
           Rate  hash regex
hash  1043950/s    --   -1%
regex 1054296/s    1%    --