It is called optimization

In mathematics, computer science, economics, or management science, mathematical optimization (alternatively, optimization or mathematical programming) is the selection of a best element (with regard to some criteria) from some set of available alternatives.

Case in point:

12 hours 84.55 Th/s 850390912
3 hours 84.32 Th/s 212027136
22.5 minutes 84.45 Th/s 26543616
256 seconds 86.11 Th/s 5132816
128 seconds 87.29 Th/s 2601452

My machines are hosted and controlled by http://Toom.im as above. The very best achieved at the manufacturer's hosting facilities was an 82 Th/s inconsistent max prior to moving to Jonathan's hands-on operation.

Please do not mistake "fiddling" with optimization. Fiddling is when you do not know what you are doing. Not dissimilar to fidgeting.