Scala functional vs imperative

gistfile1.scala

object Dot {

  def main(args: Array[String]) {

    println("Imperative")
    val startTime = System.nanoTime()
    testImperative()
    val endTime = System.nanoTime()
    println((endTime - startTime) / 1000000 + "\n")

    println("Functional")
    val startTime3 = System.nanoTime()
    testFunctional()
    val endTime3 = System.nanoTime()
    println((endTime3 - startTime3) / 1000000 + "\n")
  }

  def testFunctional() {
    val f = Array(1, 2, 3)
    val s = Array(1.0, 2.0, 3.0)
    val res = SMoriczka.dotProduct(s, f)
    println(res)
  }

  def testImperative() {
    val f = Array(1, 2, 3)
    val s = Array(1.0, 2.0, 3.0)
    val res = SMoriczka.dotProduct2(s, f)
    println(res)
  }
}

Output:
Imperative
14.0
23

Functional
14.0
93