Rate  GMPz4   GMPz  GMPz2  GMPz3 int128   GMPn
GMPz4  2.19/s     --    -1%   -92%   -93%   -98%   -98%
GMPz   2.21/s     1%     --   -92%   -93%   -98%   -98%
GMPz2  28.1/s  1182%  1173%     --   -16%   -71%   -76%
GMPz3  33.3/s  1422%  1411%    19%     --   -66%   -71%
int128 97.2/s  4339%  4306%   246%   192%     --   -17%
GMPn    117/s  5220%  5182%   315%   250%    20%     --