SOSP ’14 Symposium on Software Performance: Joint Descartes/Kieker/Palladio Days 2014 Stuttgart, Germany, November 26–28, 2014 Proceedings Editors: Steffen Becker, Wilhelm Hasselbring, Andr´ e van Hoorn, Samuel Kounev, and Ralf Reussner Published as: University of Stuttgart, Faculty of Computer Science, Electrical En- gineering, and Information Technology, Technical Report Computer Science No. 2014/05