Rate uniq2 uniq1 uniq3 uniq4
uniq2 34.2/s    --   -4%  -30%  -30%
uniq1 35.5/s    4%    --  -28%  -28%
uniq3 49.1/s   43%   38%    --    0%
uniq4 49.1/s   43%   38%    0%    --