Elapsed time of a piece of code

time.scala

import scala.concurrent.Future
import scala.concurrent.ExecutionContext.Implicits.global
def time[T](f:  => T, message:  String = "" ):  T  = {
  val a = System.currentTimeMillis()
  val r = f
  val b = System.currentTimeMillis()
  Future { println(message + " elapsed time :"+  (b - a) + "ms" + Console.RESET )}
  r
}

Console.RESET is usefull to reset color to default