Moore's law in its original 1965 meaning was an observation that transistor counts doubled every year and a projection that this would continue for the next dec

Moore's law in its original 1965 meaning was an observation that transistor counts doubled every year and a projection that this would continue for the next decade. Moore revised the projection downward in 1975 to every two years, which remarkably has held into the 2010s. But it is transistor count, not necessarily performance. A coworker calculated that performance was doubling in 18 months. https://www.kth.se/social/upload/507d1d3af276540519000002/Moore's%20law.pdf https://www.kth.se/social/upload/507d1d3af276540519000002/Mo... Transistor counts continue an exponential growth curve, particularly in GPUs. It may be time for another downward revision on the rate (2.5 years? 3 years?), but we aren't getting as much single-threaded performance out of the increased transistor count. This provides increasing performance difference between the highly parallel GPU architecture and the more limited parallelism of traditional CPUs.