Maybe there will be two classes of applications. The elite, like browsers that are constantly fed data about how people use them, regularly updated so optimizat

Maybe there will be two classes of applications. The elite, like browsers that are constantly fed data about how people use them, regularly updated so optimization is compiled right in; and the not so elite, that rely on per-run startup optimization for good performance. IIRC gcc already links in a runtime system for recovering runtime type information about dynamic cast. It's not hard to imagine C++x20 (or whatever) including some kind of runtime optimizer.