Can Cesium handle many 3D models now?

In my project(based on worldwind), there are hundreds of 3D models built for a small city. To load all these models once, it takes several seconds for a common configured computer.
My question is: Can Cesium handle many 3D models? if the answer is true, how about its performance compared with worldwind? Can all these .dae files be converted to one .gltf file?


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