def_val.scala

class A {
  val v = (x: Int) => x * 3
  def f(x: Int) = x * 3
}
object A {
  def v() {
    val a = new A
    var i = 0
    var n = 1
    while (i < 1000000) {
      n = a.v(n)
      i += 1
    }
    println(n)
  }

  def f() {
    val a = new A
    var i = 0
    var n = 1
    while (i < 1000000) {
      n = a.f(n)
      i += 1
    }
    println(n)
  }
  def main(args: Array[String]) {
    println("val/fun")
    (1 to 10) foreach { i =>
      println(i)
      val t0 = System.nanoTime()
      v()
      val t1 = System.nanoTime()
      f()
      val t2 = System.nanoTime()
      v()
      val t3 = System.nanoTime()
      f()
      val t4 = System.nanoTime()
      println("val " + (t1 - t0) / 1000000.0 + "/ def" + (t2 - t1) / 1000000.0)
      println("val " + (t3 - t2) / 1000000.0 + "/ def" + (t4 - t3) / 1000000.0)
    }
  }
}