### 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)

gui[0] = value[0].boolean ? 1 : 0;
			gui[1] = value[1].boolean ? 1 : 0;
		} break;
		case ShaderLanguage::TYPE_BVEC3: {
			uint32_t *gui = (uint32_t *)data;
			gui[0] = value[0].boolean ? 1 : 0;
			gui[1] = value[1].boolean ? 1 : 0;
			gui[2] = value[2].boolean ? 1 : 0;
		} break;
		case ShaderLanguage::TYPE_BVEC4: {
			uint32_t *gui = (uint32_t *)data;
			gui[0] = value[0].boolean ? 1 : 0;
			gui[1] = value[1].boolean ? 1 : 0;
			gui[2] = value[2].boolean ? 1 : 0;
			gui[3] = value[3].boolean ? 1 : 0;
		} break;
		case ShaderLanguage::TYPE_INT: {
			int32_t *gui = (int32_t *)data;
			gui[0] = value[0].sint;
		} break;
		case ShaderLanguage::TYPE_IVEC2: {
			int32_t *gui = (int32_t *)data;
			for (int i = 0; i < 2; i++) {
				gui[i] = value[i].sint;
			}
		} break;
		case ShaderLanguage::TYPE_IVEC3: {
			int32_t *gui = (int32_t *)data;
			for (int i = 0; i < 3; i++) {
				gui[i] = value[i].sint;