Get loading time informations & metadata?

Good afternoon,
I succeed in visualizing my cesium 3D tiles data (DSM mesh/TIN with a texture) with cesiumJS and cesium-ion.I would like to find a way with cesium JS or cesium ion to get some performance informations regarding displaying/loading time of a tileset. I would like also get some informations regarding the number of meshs/TIN composing a tileset, the area (km2) of a tileset, the density of meshs/tin by area unity. Also some informations regarding the size of the texture.
How to make this kind of assessmment ? With adding some javascript lines ? Or with windows command systems ?
Thanks a lot.