Expanding a three-lane highway into a six-lane highway doesn’t double it, for much the same reason that doubling the number of cores on your CPU doesn’t mean you can do exactly twice as much work. The cars have to merge to get on and off the highway, and that reduces the overall efficiency.
Expanding a three-lane highway into a six-lane highway doesn’t double it, for much the same reason that doubling the number of cores on your CPU doesn’t mean you can do exactly twice as much work. The cars have to merge to get on and off the highway, and that reduces the overall efficiency.