Our most recently deployed generation of edge servers, Gen X, used AMD Rome CPUs. Compared with that, the newest Arm based CPUs process an incredible 57% more Internet requests per watt. While AMD has a sequel, Milan (and which Cloudflare will also be deploying), it doesn’t achieve the same degree of energy efficiency that the Arm processor does — managing only 39% more requests per watt than Rome CPUs in our existing fleet. As Arm based CPUs become more widely deployed, and our software is further optimized to take advantage of the Arm architecture, we expect further improvements in the energy efficiency of Arm servers.