Scala perf: Why is this Scala app 30x slower than the equivalent Java app?

Question

I am a very proficient C# developer, but need to start writing code that works on the JVM. The Java language is feature poor compared to C# these days, so I was interested in t

Answer 1

$ javac app.java
$ scalac app.scala 
$ scala HelloWorld
hello scala
ms, checksum = 
1051
-100000
$ java app
hello, java
ms, checksum = 
1044
-100000

What I'm doing wrong?