So I have in front of me two of exactly the same macbook pros, mid 2015 15". Exactly same specs. Exactly same programs installed, mirrored from time machinebackup. They are exact clones of one another. One has 7 battery cycles, one has 67 battery cycles, thats the only difference. 2.5ghx quad core i7 16gb ram AMD 2gb Card etc etc etc I am doing a test through imovie. Same files, same everything. Hit share at same time for a 1 hr 45 minute video to be processed. One computer does it in 13 minutesm other in 17 minutes. Why would this happen? What could cause this? Makes no sense to me. Am I missing something? If there are literally same computer, same everything including right down to the hard drive being cloned why would one be faster? BTW same thing happened with handbrake converting the same file. FPS was faster on one machine. Why?