I think that's a bit different. Scala – just like Java – allows you to write inefficient code. The Android's GC is pretty poor, so things you might have gotten

I think that's a bit different. Scala – just like Java – allows you to write inefficient code. The Android's GC is pretty poor, so things you might have gotten away with when programming on the JVM in Java or Scala might require another thought on Dalvik. But there is nothing in Scala which would make it slower etc. than Java. Both languages generate bytecode. Clojure is different here, because it more or less needs to boot-strap its runtime before it executes code.