Performance issues with converted models with gltfjsx

[jadeworks-dev]

I used gltfjsx to convert a glb file exported from Blender (with the --instance option enabled) into code.

The resulting tsx file has approximately 10,000 lines of code. When I run this scene, I get less than 20 fps even with around 500 draw calls.

However, when I load the scene using 'useGltf' and add it to the scene as primitive, I get 60 fps even with around 3,000 draw calls.

What could be the problem? Has anyone experienced something similar?

Even if I instantiate overlapping meshes, can performance degrade with longer code lengths?