var wg sync.WaitGroup
	wg.Add(1)
	done := make(chan struct{})
	go func() {
		defer wg.Done()
		for {
			// Add more things here that could influence metrics.
			for i := 0; i < len(readMetricsSink); i++ {
				readMetricsSink[i] = make([]byte, 1024)
				select {
				case <-done:
					return
				default:
				}
			}
			runtime.GC()
		}
	}()

	sum := func(us []uint64) uint64 {