The optimization discussion is always interesting, but… does a 10 or 20% difference in speed really matter here? You’re basically choosing between the JVM vs BEAM. I think the difference is close enough that you should consider maintainability, learning curve, debuggability, whether you’ll need clustering or not, etc.
In my experience, being able to run multiple apps in a cluster, and connect to it anytime and trace and analyze things was a game changer. On the other end, the ease of finding programmers and the high adoption in the enterprise world are big pluses of the JVM.
(Sorry for not actually answering the question!)
