I've created the same test app with Play 2.1 RC2 and Scala: https://github.com/jamesward/scale-play-web-app https://github.com/jamesward/scale-play-web-app On

I've created the same test app with Play 2.1 RC2 and Scala: https://github.com/jamesward/scale-play-web-app https://github.com/jamesward/scale-play-web-app On my laptop I have half as many cores as the poster and am getting about half the performance.