private final long delay;
        private final TimeUnit unit;

        public DelayBeforeBuildMutator(long delay, TimeUnit unit) {
            this.unit = unit;
            this.delay = delay;
        }

        @Override
        public void beforeBuild(BuildContext context) {
            try {
                unit.sleep(delay);
            } catch (InterruptedException e) {

          (TF_MatMulOp $a, (TF_TransposeOp $b, (TF_SubOp (TF_RangeOp
             /*start=*/(TF_RankOp $b),
             /*limit=*/(TF_ConstOp TFi32<0>),
             /*delta=*/(TF_ConstOp TFi32<-1>)), (TF_ConstOp TFi32<1>))),
           $at, ConstBoolAttrTrue, $grad_a, $grad_b)>;

// Matmul with transpose on a to matmul with explicit transpose op and a not
// transposed.

				testutil.NewNode("existing1"),
				testutil.NewNode("existing2"),
			},
			delay: 2 * quarantineTime,
			pods: []*v1.Pod{
				makePod("a", "existing1", v1.PodRunning),
				makePod("b", "existing2", v1.PodFailed),
				makePod("c", "existing2", v1.PodSucceeded),
			},
			itemsInQueue: 2,
		},
		{
			name:  "no nodes",
			delay: 2 * quarantineTime,
			pods: []*v1.Pod{
				makePod("a", "deleted", v1.PodFailed),

      // http://graphics.stanford.edu/~seander/bithacks.html#IntegerMinOrMax

      int delta = a - b; // can't overflow, since a and b are nonnegative

      int minDeltaOrZero = delta & (delta >> (Integer.SIZE - 1));
      // equivalent to Math.min(delta, 0)

      a = delta - minDeltaOrZero - minDeltaOrZero; // sets a to Math.abs(a - b)
      // a is now nonnegative and even

   * size() as a hint only.
   *
   * @param delta the difference between the true size of the collection and the values returned by
   *     the size method
   */
  public static <T extends @Nullable Object> Collection<T> misleadingSizeCollection(int delta) {
    // It would be nice to be able to return a real concurrent

   * size() as a hint only.
   *
   * @param delta the difference between the true size of the collection and the values returned by
   *     the size method
   */
  public static <T extends @Nullable Object> Collection<T> misleadingSizeCollection(int delta) {
    // It would be nice to be able to return a real concurrent

	if err != nil {
		serveError(w, http.StatusInternalServerError, "failed to compute delta")
		return
	}

	p1.TimeNanos = ts // set since we don't know what profile.Merge set for TimeNanos.
	p1.DurationNanos = dur

	w.Header().Set("Content-Type", "application/octet-stream")
	w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s-delta"`, name))
	p1.Write(w)
}

                        crawlerContext.intervalController.delay(IntervalController.NO_URL_IN_QUEUE);
                    }

                    threadCheckCount++;
                }

                // interval
                if (crawlerContext.intervalController != null) {
                    crawlerContext.intervalController.delay(IntervalController.WAIT_NEW_URL);
                }
            }

Istio currently supports both SotW and Delta protocol. However, the delta implementation is not yet optimized well, so it performs mostly the same as SotW.

## Controllers

              }
            }

          val peerInitialWindowSize = newPeerSettings.initialWindowSize.toLong()
          delta = peerInitialWindowSize - previousPeerSettings.initialWindowSize.toLong()
          streamsToNotify =
            when {
              delta == 0L || streams.isEmpty() -> null // No adjustment is necessary.
              else -> streams.values.toTypedArray()
            }