perf.scala

object Time {
  def apply[T](name: String)(block: => T) {
    val start = System.currentTimeMillis
    try {
        block
    } finally {
        val diff = System.currentTimeMillis - start
        println("# Block \"" + name +"\" completed, time taken: " + diff + " ms (" + diff / 1000.0 + " s)")
    }
  }
}


val list = (0 to 10000).toList
val two = 2

Time("and multiply by 2 in val") {
	list.foreach( _ * two )
}

Time("and multiply by 2") {
	list.foreach( _ * 2 )
}