emacs and some of the TeX programs worked that way. Maybe they still do. I haven't looked at that in a quarter century. To elaborate: the programs would do all

emacs and some of the TeX programs worked that way. Maybe they still do. I haven't looked at that in a quarter century. To elaborate: the programs would do all of their initialization and loading of things that would be used in any run, then dump themselves. The result of undump was an executable that had already done all of its boilerplate loading and was ready to process its arguments and inputs. It was bigger, since it had a bunch of heap stored, but it was better than hammering away on your CPU at 1 million instructions per second.