Little utility for timing a block of code

Timer.scala

object Timer {

  /** Time a block of code, print the duration in millis, and return the value of the block*/
  def time[A](f: => A): A = time2(f) match {
    case (a, nanos) =>
      println("time: " + nanos / 1000000L + "ms")
      a
  }

  /** Time a block of code, return a tuple of the value of the block and the duration in nanos */
  def time2[A](f: => A): (A, Long) = {
    val s = System.nanoTime
    val ret = f
    (ret, System.nanoTime - s)
  }

  /** Time a block of code, and return just the duration in nanos*/
  def nanos(f: => Any): Long = time2(f)._2
  def micros[A](f: => A): Long = nanos(f) / 1000L
  def millis[A](f: => A): Long = nanos(f) / 1000000L

}