In Cesium 1.15 blog post it's mentioned that decreased GPU memory usage in BillboardCollection and LabelCollection by using WebGL instancing. Will it be applicable to entities also? I tried loading 5000+ entities with billboards and labels using Cesium 1.15 but I don't see any improvement in memory usage.
Yes, billboard entities are built on top of the BillboardCollection. Do you have the ANGLE_instanced_arrays WebGL extension? If you go to webglreport.com, it would be listed under supported extensions.
Thanks for your reply. As you said I tried webglreport.com and it's showing
ANGLE_instanced_arrays WebGL extension under supported extensions. I am using IE browser. Will it work on chrome only?
This will work in IE and all browsers that report supporting the ANGLE_instanced_arrays extension. This saves GPU (or really driver controlled memory) so the memory savings may be for the GPU process, not the browser tab.
For more info, see http://cesiumjs.org/2015/10/28/Billboard-Instancing/