collect   monitor  % diff
  1            1.1547402675034486            1.0481191501849672           -0.6131458221558209            0.0027567062486410            0.0028074850007769
  4            0.8450806453264993            0.9556744469021896           -0.6283305773543117            0.0020740339207519            0.0023351198890000
  0            1.6798119093607358
  3            1.9640834374911327