FPS drop while camera zoom pan with object count 10k with instance mesh

Using an instance mesh as in official example


there is a significant drop in FPS (it gets to 30-35 fps) while continuous zoom and pan.

Any workaround for the same and a probable cause.

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Rendering 10k geometries on web is demanding - and instancing can’t help much with that.

Even in this example, most of the 10k elements are rendered, even if they would not be visible - either are rendered far away, or are obstructed by geometries in front. Try optimizing the amount of geometries on the scene, you can also try adding LOD - objects in the distance can be often be approximated by rendering a sprite or a point, instead of an entire geometry, and still give a good visual result.