Stupid Comparison from http://blog.efftinge.de/2011/12/groovy-scala-java-xtend-updated-stupid.html

bench.sh

#!/bin/bash

function run() {
    export JAVA_VERSION=$1
    shift
    export JAVA_OPTS="$*"
    echo "JAVA_VERSION = ${JAVA_VERSION}"
    echo "JAVA_OPTS    = ${JAVA_OPTS}"
    i=0
    while [[ $i -lt 10 ]]; do
        echo -n "java  : "
        java $JAVA_OPTS Java
        echo -n "scala : "
        java $JAVA_OPTS -Xbootclasspath/a:/usr/local/Cellar/scala/2.9.1/libexec/lib/scala-library.jar -classpath classes Scala
        let i++
    done
    unset JAVA_OPTS
    echo
}

run 1.6
run 1.6 -Xverify:none
run 1.6 -Xverify:none -XX:+DoEscapeAnalysis -XX:+UseCompressedOops -Xmx256m -Xms256m

run 1.7
run 1.7 -Xverify:none
run 1.7 -Xverify:none -XX:+DoEscapeAnalysis -XX:+UseCompressedOops -Xmx256m -Xms256m

Java.java

import java.util.List;
import java.util.ArrayList;

public class Java {
  public static void main(String[] args) {
    List<Object> absoluteResult = new ArrayList<Object>(/*3000000*/);
    long before = System.nanoTime();
    for (int i=0; i < 1000000; i++) {
      List<Object> result = new ArrayList<Object>(3);
      result.add("foo");
      result.add( 23);
      result.add(true);
      for (Object y : result) {
        absoluteResult.add(foo(y));
      }
    }
    System.out.println("Took : "+((System.nanoTime() - before) / 1e6)
      +" ms, number of elements : "+absoluteResult.size());
  }

  static String foo(Object s) {
    if (s instanceof String) {
      return "String";
    } else if (s instanceof Boolean) {
      return "Boolean";
    } else if (s instanceof Integer) {
      return "Integer";
    } else {
      throw new IllegalArgumentException();
    }
  }
}

results.txt

JAVA_VERSION = 1.6
JAVA_OPTS    = 
java  : Took : 155.822 ms, number of elements : 3000000
scala : Took : 124.153ms, number of elements : 3000000
java  : Took : 155.336 ms, number of elements : 3000000
scala : Took : 121.377ms, number of elements : 3000000
java  : Took : 155.748 ms, number of elements : 3000000
scala : Took : 120.89ms, number of elements : 3000000
java  : Took : 153.623 ms, number of elements : 3000000
scala : Took : 122.427ms, number of elements : 3000000
java  : Took : 159.664 ms, number of elements : 3000000
scala : Took : 122.732ms, number of elements : 3000000
java  : Took : 156.592 ms, number of elements : 3000000
scala : Took : 120.629ms, number of elements : 3000000
java  : Took : 156.144 ms, number of elements : 3000000
scala : Took : 122.455ms, number of elements : 3000000
java  : Took : 157.552 ms, number of elements : 3000000
scala : Took : 121.565ms, number of elements : 3000000
java  : Took : 154.017 ms, number of elements : 3000000
scala : Took : 122.62ms, number of elements : 3000000
java  : Took : 157.406 ms, number of elements : 3000000
scala : Took : 122.469ms, number of elements : 3000000

JAVA_VERSION = 1.6
JAVA_OPTS    = -Xverify:none
java  : Took : 155.123 ms, number of elements : 3000000
scala : Took : 121.303ms, number of elements : 3000000
java  : Took : 154.947 ms, number of elements : 3000000
scala : Took : 123.679ms, number of elements : 3000000
java  : Took : 156.867 ms, number of elements : 3000000
scala : Took : 124.435ms, number of elements : 3000000
java  : Took : 154.12 ms, number of elements : 3000000
scala : Took : 123.425ms, number of elements : 3000000
java  : Took : 152.919 ms, number of elements : 3000000
scala : Took : 125.821ms, number of elements : 3000000
java  : Took : 155.846 ms, number of elements : 3000000
scala : Took : 121.573ms, number of elements : 3000000
java  : Took : 153.942 ms, number of elements : 3000000
scala : Took : 122.389ms, number of elements : 3000000
java  : Took : 152.932 ms, number of elements : 3000000
scala : Took : 123.796ms, number of elements : 3000000
java  : Took : 159.708 ms, number of elements : 3000000
scala : Took : 121.521ms, number of elements : 3000000
java  : Took : 152.429 ms, number of elements : 3000000
scala : Took : 124.841ms, number of elements : 3000000

JAVA_VERSION = 1.6
JAVA_OPTS    = -Xverify:none -XX:+DoEscapeAnalysis -XX:+UseCompressedOops -Xmx256m -Xms256m
java  : Took : 144.895 ms, number of elements : 3000000
scala : Took : 120.291ms, number of elements : 3000000
java  : Took : 147.53 ms, number of elements : 3000000
scala : Took : 117.438ms, number of elements : 3000000
java  : Took : 141.173 ms, number of elements : 3000000
scala : Took : 118.536ms, number of elements : 3000000
java  : Took : 144.656 ms, number of elements : 3000000
scala : Took : 121.95ms, number of elements : 3000000
java  : Took : 145.137 ms, number of elements : 3000000
scala : Took : 117.507ms, number of elements : 3000000
java  : Took : 143.513 ms, number of elements : 3000000
scala : Took : 124.118ms, number of elements : 3000000
java  : Took : 143.039 ms, number of elements : 3000000
scala : Took : 120.529ms, number of elements : 3000000
java  : Took : 143.316 ms, number of elements : 3000000
scala : Took : 118.592ms, number of elements : 3000000
java  : Took : 142.396 ms, number of elements : 3000000
scala : Took : 118.06ms, number of elements : 3000000
java  : Took : 143.269 ms, number of elements : 3000000
scala : Took : 120.44ms, number of elements : 3000000

JAVA_VERSION = 1.7
JAVA_OPTS    = 
java  : Took : 123.858 ms, number of elements : 3000000
scala : Took : 100.752ms, number of elements : 3000000
java  : Took : 123.444 ms, number of elements : 3000000
scala : Took : 101.915ms, number of elements : 3000000
java  : Took : 123.086 ms, number of elements : 3000000
scala : Took : 101.427ms, number of elements : 3000000
java  : Took : 123.411 ms, number of elements : 3000000
scala : Took : 102.995ms, number of elements : 3000000
java  : Took : 124.833 ms, number of elements : 3000000
scala : Took : 100.345ms, number of elements : 3000000
java  : Took : 122.855 ms, number of elements : 3000000
scala : Took : 110.342ms, number of elements : 3000000
java  : Took : 123.476 ms, number of elements : 3000000
scala : Took : 100.746ms, number of elements : 3000000
java  : Took : 124.363 ms, number of elements : 3000000
scala : Took : 102.314ms, number of elements : 3000000
java  : Took : 126.36 ms, number of elements : 3000000
scala : Took : 104.125ms, number of elements : 3000000
java  : Took : 123.69 ms, number of elements : 3000000
scala : Took : 104.076ms, number of elements : 3000000

JAVA_VERSION = 1.7
JAVA_OPTS    = -Xverify:none
java  : Took : 125.788 ms, number of elements : 3000000
scala : Took : 102.966ms, number of elements : 3000000
java  : Took : 127.147 ms, number of elements : 3000000
scala : Took : 105.484ms, number of elements : 3000000
java  : Took : 125.818 ms, number of elements : 3000000
scala : Took : 101.9ms, number of elements : 3000000
java  : Took : 126.939 ms, number of elements : 3000000
scala : Took : 102.787ms, number of elements : 3000000
java  : Took : 125.077 ms, number of elements : 3000000
scala : Took : 100.708ms, number of elements : 3000000
java  : Took : 124.803 ms, number of elements : 3000000
scala : Took : 101.042ms, number of elements : 3000000
java  : Took : 124.923 ms, number of elements : 3000000
scala : Took : 102.194ms, number of elements : 3000000
java  : Took : 123.323 ms, number of elements : 3000000
scala : Took : 102.93ms, number of elements : 3000000
java  : Took : 123.966 ms, number of elements : 3000000
scala : Took : 100.922ms, number of elements : 3000000
java  : Took : 125.962 ms, number of elements : 3000000
scala : Took : 102.446ms, number of elements : 3000000

JAVA_VERSION = 1.7
JAVA_OPTS    = -Xverify:none -XX:+DoEscapeAnalysis -XX:+UseCompressedOops -Xmx256m -Xms256m
java  : Took : 126.786 ms, number of elements : 3000000
scala : Took : 96.999ms, number of elements : 3000000
java  : Took : 126.266 ms, number of elements : 3000000
scala : Took : 97.28ms, number of elements : 3000000
java  : Took : 127.34 ms, number of elements : 3000000
scala : Took : 96.257ms, number of elements : 3000000
java  : Took : 130.449 ms, number of elements : 3000000
scala : Took : 97.744ms, number of elements : 3000000
java  : Took : 129.604 ms, number of elements : 3000000
scala : Took : 97.947ms, number of elements : 3000000
java  : Took : 127.406 ms, number of elements : 3000000
scala : Took : 97.447ms, number of elements : 3000000
java  : Took : 129.006 ms, number of elements : 3000000
scala : Took : 98.002ms, number of elements : 3000000
java  : Took : 127.636 ms, number of elements : 3000000
scala : Took : 100.271ms, number of elements : 3000000
java  : Took : 128.147 ms, number of elements : 3000000
scala : Took : 96.955ms, number of elements : 3000000
java  : Took : 127.948 ms, number of elements : 3000000
scala : Took : 99.134ms, number of elements : 3000000

Scala.scala

import collection.mutable.ArrayBuffer
import annotation.tailrec

object Scala extends App {
  final val absoluteResult = new ArrayBuffer[Any](/*3000000*/)

  private [this] final def runIt(times: Int): Unit = 
    if (times > 0) {
      append("foo" :: 23 :: true :: Nil)
      runIt(times-1)
    }

  private[this] final def append(xs: List[Any]): Unit =
    if (xs ne Nil) {
      absoluteResult += foo(xs.head)
      append(xs.tail)
    }

  private[this] final def foo(obj : Any) = obj match {
    case _:String => "String"
    case _:Boolean => "Boolean"
    case _:Int => "Integer"
    case _ => throw new IllegalArgumentException()
  }

  val before = System.nanoTime()
  runIt(1000000)

  printf("Took : %sms, number of elements : %d%n", (System.nanoTime() - before) / 1e6, absoluteResult.size)
}