For a very long time between 1970 and 2005 doubling the transistors halved the time taken for any task. We're well past this point. If you don't think so try a

For a very long time between 1970 and 2005 doubling the transistors halved the time taken for any task. We're well past this point. If you don't think so try and calculate a_{i+1} = rand_int() a_i mod 232 on a machine from today and one from 2005. Then do the same with a machine from 2005 and 1990.