Until the mid oft he 2000’s, there was some kind of an unbreakable fact regarding the vertical scalability of computer hardware and therefore the underlying scaling rules for computer software: Moore’s law. Moore’s law states that the number of transistors on integrated circuits doubles approximately every two years. In good old times of single core processors this meant that also the computing power doubled by this effect. This was a safe harbour for gaining performance in software development. The time was with you, you just had to wait and your execution was getting faster without any changes in the software architecture. Moore’s law is still a valid rule of thumb, but times for the software developers and architects have changed. Although the number of transistors is still growing rapidly, this results in more processor cores since the mid of the 2000’s which means a shift of the vertical scaling approach to horizontal scaling. This also means to gain a positive impact from micro