Pareto's law. You optimize the few parts that matter speedwise, and the rest you can do in ordinary "higher level, garbage collected" fashion. In C++ you can'

Pareto's law. You optimize the few parts that matter speedwise, and the rest you can do in ordinary "higher level, garbage collected" fashion. In C++ you can't do that. This is the standard argument for Lisp type-optimization (DECLAIM, THE, etc.) as well.