All the usual benchmark disclaimers apply, but Scala appears to compare pretty favourably in the Programming Language Shootout: http://benchmarksgame.alioth.de

All the usual benchmark disclaimers apply, but Scala appears to compare pretty favourably in the Programming Language Shootout: http://benchmarksgame.alioth.debian.org/u64q/benchmark.php?test=all&lang=scala&lang2=clojure&data=u64q http://benchmarksgame.alioth.debian.org/u64q/benchmark.php?t... Generally Scala appears to use less time, less memory and less code. I have not ever used either so I cannot anecdotally confirm this.