### 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)

uint8_t *data = &p_buffer[offset];
		HashMap<StringName, Variant>::ConstIterator V = p_parameters.find(E.key);
		if (V) {
			
			_fill_std140_variant_ubo_value(E.value.type, E.value.array_size, V->value, data);
		} else if (E.value.default_value.size()) {
			
			_fill_std140_ubo_value(E.value.type, E.value.default_value, data);
			
		} else {
			
			if ((E.value.type == ShaderLanguage::TYPE_VEC3 || E.value.type == ShaderLanguage::TYPE_VEC4) && E.value.hint == ShaderLanguage::ShaderNode::Uniform::HINT_SOURCE_COLOR) {
				
				_fill_std140_variant_ubo_value(E.value.type, E.value.array_size, Color(0, 0, 0, 1), data);
			} else {
				
				_fill_std140_ubo_empty(E.value.type, E.value.array_size, data);
			}
		}
	}
	if (uses_global_buffer != (global_buffer_E != nullptr)) {
		if (uses_global_buffer) {
			global_buffer_E = material_storage->global_shader_uniforms.materials_using_buffer.push_back(self);
		} else {
			material_storage->global_shader_uniforms.materials_using_buffer.erase(global_buffer_E);
			global_buffer_E = nullptr;
		}
	}
}
MaterialData::~MaterialData() {