### Godot version

v4.2.beta1.official [b1371806a]

### System information

Ubuntu 22.04.3 LTS 22.04 - X11 - GLES3 (Compatibility) - AMD Radeon RX 560 Series (polaris11, LLVM 15.0.7, DRM 3.42, 5.15.0-88-generic) () - AMD Ryzen 3 1200 Quad-Core Processor (4 Threads)

### Issue description

![image](https://github.com/godotengine/godot/assets/1330325/7a986599-5a68-42a4-beb1-5d3b4bf7db6b)
![image](https://github.com/godotengine/godot/assets/1330325/e8b8546b-b47b-4add-9567-7f70709ab03c)

Culling 3D goes bellow 60 fps even with just about 50 simple animated models. With v4.2.dev6.official [57a6813bb] many more models can be spawned without fps drop. However, both versions do show high cpu usage for culling 3D. Without animations there's barely any usage.

### Steps to reproduce

Spawn models with animation with the Compatibility renderer.

### Minimal reproduction project

[CullMRP.zip](https://github.com/godotengine/godot/files/13400514/CullMRP.zip)

vertex_input_mask |= uses_custom0 << 5;
	vertex_input_mask |= uses_custom1 << 6;
	vertex_input_mask |= uses_custom2 << 7;
	vertex_input_mask |= uses_custom3 << 8;
	vertex_input_mask |= uses_bones << 9;
	vertex_input_mask |= uses_weights << 10;
	uses_screen_texture = gen_code.uses_screen_texture;
	uses_screen_texture_mipmaps = gen_code.uses_screen_texture_mipmaps;
	uses_depth_texture = gen_code.uses_depth_texture;
	uses_normal_texture = gen_code.uses_normal_roughness_texture;
	uses_vertex_time = gen_code.uses_vertex_time;
	uses_fragment_time = gen_code.uses_fragment_time;
#ifdef DEBUG_ENABLED
	if (uses_particle_trails) {
		WARN_PRINT_ONCE_ED("Particle trails are only available when using the Forward+ or Mobile rendering backends.");
	}
	if (uses_sss) {
		WARN_PRINT_ONCE_ED("Sub-surface scattering is only available when using the Forward+ rendering backend.");
	}
	if (uses_transmittance) {
		WARN_PRINT_ONCE_ED("Transmittance is only available when using the Forward+ rendering backend.");
	}
	if (uses_depth_texture) {
		WARN_PRINT_ONCE_ED("Reading from the depth texture is not supported when using the GL Compatibility backend yet. Support will be added in a future release.");
	}
	if (uses_normal_texture) {
		WARN_PRINT_ONCE_ED("Reading from the normal-roughness texture is only available when using the Forward+ or Mobile rendering backends.");
	}
#endif
#if 0