Everyone knows Moore's law: every 18 months, computers get twice as fast. But there's a less-well known related version of this law, which is Lesse's Law. The problem with Moore's Law is that while computers double in speed every 18 months, this is not actually true for any given computer. In fact, Lesse's law states that a computer halves in speed every 18 months, because of the accretion of drivers, installed programs, lack of memory, spyware, adware, rootkits and the like. Which explains why it took five minutes for the browser to load this page for me to type this tedious observation.