collect   monitor  % diff
  1            0.8168565892728975            0.8036195809947007           -0.6363453490882692            0.0026697846340527            0.0024742766498137
  4            1.5507470013225917            1.5000710313240069           -0.6299379702210886            0.0040343926148143            0.0040660199946145
  0            0.7245431083069787
  3            2.1144187624144677