Rate splice_unique2 splice_unique  shift_unique    map_unique
splice_unique2  83836/s             --          -10%          -15%          -28%
splice_unique   92839/s            11%            --           -6%          -20%
shift_unique    99211/s            18%            7%            --          -14%
map_unique     115924/s            38%           25%           17%            --