Here at Sumo Logic we write a lot of Scala code. We also have a lot of data, so some of our code has to go really, really fast. While Scala allows us to write correct, clear code quickly, it can be challenging to ensure that you are getting the best performance possible.
Y. Hayduk, A. Sobe, and P. Felber. Distributed Applications and Interoperable Systems, volume 9038 of Lecture Notes in Computer Science, Springer, (2015)
M. Steindorfer, and J. Vinju. Proceedings of the 2015 ACM SIGPLAN International Conference on Object-Oriented Programming, Systems, Languages, and Applications, page 783--800. New York, NY, USA, ACM, (2015)
P. Suter, A. Köksal, and V. Kuncak. Proceedings of the 18th international conference on Static analysis, page 298--315. Berlin, Heidelberg, Springer-Verlag, (2011)