Taking more time for loading the 3d tiles

**When I am loading own terrain(from “geoserver” using “geoserver terrain provider”)+ 3D tile(size 1.78MB, contains the 2D road information) , it is taking the loading time of 8.42 sec to load on the cesium globe. similarly when i am loading **own terrain(from “geoserver” using "geoserver terrain provider")+3D tile(size 6.6MB, containing building) , it is taking the loading time of 6.3 minutes to load on the cesium globe. I am not able to find the reason for this. How to minimize the loading time. I have attached the images of 3D tiles.

I posted some suggestions here: https://github.com/AnalyticalGraphicsInc/cesium/issues/8096#issuecomment-523924225

Let me know if you get a chance to try tiling the data on Cesium ion, or if you can share your tileset here.