My problem with this analysis is ignoring the fact of who is using which computer. So far new people in the company get the M3, while old people have M2, and the people who has been the longest time in the company have an M1. Who is going to work on more critical tasks with more changes in the code? who is going to work mostly in easy bugs until they get some experience with the code in the company? I bet you if you give both populations the same computer the compiling times are going to be faster for the new people. For me the analysis doesn't have enough dimensions, it should take into account the time since the person was hired in the company and the seniority. I would also have added more type of graphs (boxplots seems a better way to compare the information), and also I would have measure the total % of CPU usage. The battery/AC analysis gave me the impression that M3 might be underutilized and that it is going to be impossible to get lower compiling times without faster single core speeds (which might be a relevant information for the future).
