collect   monitor  % diff
  1            0.6173931243544057            0.6734298028604134           -0.3794788661001585            0.0018346691467501            0.0019142054534917
  4            0.7070967433666462            0.7020957619546099           -0.3856538132114012            0.0018938946729978            0.0019175774525999
  0            0.4780002646359195
  3            1.6412548276282211