if (servedDate != null) {
          maxOf(0, receivedResponseMillis - servedDate.time)
        } else {
          0
        }

      val receivedAge =
        if (ageSeconds != -1) {
          maxOf(apparentReceivedAge, SECONDS.toMillis(ageSeconds.toLong()))
        } else {
          apparentReceivedAge
        }

      val responseDuration = maxOf(0, receivedResponseMillis - sentRequestMillis)

      //  * Find out if there's enough work to start another thread.
      eachQueue@ for (queue in readyQueues) {
        val candidate = queue.futureTasks[0]
        val candidateDelay = maxOf(0L, candidate.nextExecuteNanoTime - now)

        when {
          // Compute the delay of the soonest-executable task.
          candidateDelay > 0L -> {
            minDelayNanos = minOf(candidateDelay, minDelayNanos)