The problem isn't with compiled size in general, but with code that uses reflection because it's hard to impossible to tell what code is actually executed one the reflective APIs are called. Angular is highly reflective, and we are still working on ways to reduce the size of Angular apps. The Angular team is working on code generators that remove the reflective bits, and the Dart team is working on annotations and other methods to tell the compiler what code is invoked via mirrors. This work will continue post 1.0.