Cesium Prefomance

Hi guys. I have an application that uses cesium, I build a lot of entities on the map and then use ScreenSpaceEventHandler to move them. There is a performance issue in my application, I have started to debug this process and all the events in my application. And I noticed that even when there are no entities and the map is completely empty, the map has three events (pointer move) on the main canvas. I thought that the problem is in my application, but then I went to cesium sandlecastle and saw the same behavior there. I put a breakpoint inside the function and I saw no difference between the three events. Can you explain to me, is this supposed to be like this or is there something wrong? or do you already know about this?


A sandcastle example that we can refer to would be useful