Lean and efficient system software product lines: Where aspects beat objects

Abstract. Software development in the domain of embedded and deeply em-bedded systems is dominated by cost pressure and extremely limited hardware resources. As a result, modern concepts for separation of concerns and software reuse are widely ignored, as developers worry about the thereby induced mem-ory and performance overhead. Especially object-oriented programming (OOP) is still little in demand. For the development of highly configurable fine-grained system software product lines, however, separation of concerns (SoC) is a crucial property. As the overhead of object-orientation is not acceptable in this domain, we propose aspect-oriented programming (AOP) as an alternative. Compared to OOP, AOP makes it possible to reach similar or even better separation of concerns with significantly smaller memory footprints. In a case study for an embedded system product line the memory costs for SoC could be reduced from 148–236% to 2–10 % by using AOP instead of OOP.