Tool to print future timing in Scala

StuffUsingTimedFutures.scala

object StuffUsingTimedFutures {
  def slowFuture(): Unit = {
    val future = Future {
      Thread.sleep(1000) 
    }
    TimedFuture(future).printTime("foo")
  }
}

TimedFuture.scala

package utils

import scala.concurrent.{Future, ExecutionContext}

class TimedFuture[T](future: => Future[T])(implicit ec: ExecutionContext) {
  private val start = System.nanoTime()

  def printTime(name: String): Future[T] = {
    future andThen {
      case _ => {
        val elapsed = System.nanoTime() - start
        val elapsedInMilliseconds = BigDecimal(elapsed / 1_000_000.0).setScale(4, BigDecimal.RoundingMode.HALF_UP)
        println(s"$name took $elapsedInMilliseconds ms to complete")
      }
    }
  }

}

object TimedFuture {
  def apply[T](future: => Future[T])(implicit ec: ExecutionContext) = new TimedFuture(future)
}