I noticed that, constant diff (for S7 set 20k in "Workers\Management"):

397438   8/Feb 22:10   24.96438632   730.646G   39hr 58m 56s   21.80PHs   0.06%   415.474M   12.40THs
397279   7/Feb 20:48   24.94621895   721.188G   40hr 28m 43s   21.26PHs   0.06%   420.763M   12.40THs
397238   7/Feb 15:52   24.80670238   724.086G   41hr 2m 34s   21.05PHs   0.06%   426.759M   12.41THs

and variable (vardiff "0"):

397818   11/Feb 03:05   25.28178578   731.051G   41hr 10m 46s   21.18PHs   0.06%   414.693M   12.01THs
397747   10/Feb 16:59   25.21331413   727.871G   41hr 17m 54s   21.03PHs   0.06%   415.750M   12.01THs
397723   10/Feb 13:25   24.93550825   721.073G   40hr 49m 32s   21.07PHs   0.06%   411.102M   12.01THs

but what better, fixed diff or vardiff?