Ask for help! About network latency!

Ask for help! About network latency! -- Linux Enterprise Application-Linux server application information. For details, refer to the following section. I recently studied network latency. I have learned from some papers that network latency depends on four parts: the processing latency of the sending end, the transmission latency, the routing queuing latency, and the processing latency of the receiver, the route queuing latency plays a decisive role. In my experiment, the sending speed ranges from 1 packet per second to 1000 packets per second. The delay calculated by the receiving end is decreasing, indicating that, the faster the sending speed, the lower the latency. This is totally different from the theory. I don't know why... Can someone help me?