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          Rate     la     di     ch ch_opt
la     0.329/s     --   -99%   -99%   -99%
di      25.3/s  7600%     --   -50%   -56%
ch      50.4/s 15230%    99%     --   -12%
ch_opt  57.6/s 17417%   127%    14%     --