### Godot version

Godot 4.1-beta2

### System information

Manjaro Gnome, Intel Core i7-11800H

### Issue description

On a relatively modern laptop (Intel Core i7-11800H), in a scene with many scripted nodes (total of 900+ with roughly half of them scripted), adding or duplicating a node freezes the editor for several seconds. Godot 4.0.2 handles such scenes much better!

Here is a flame graph captured while repeatedly duplicating simple Marker2D nodes with Ctrl+D in a complicated scene:
![Screenshot from 2023-06-15 23-54-38](https://github.com/godotengine/godot/assets/2766569/d0019f17-9b82-4a26-9b47-71fa7a3bef3a)

Performance data file to use with hotspot v1.4.1 (relevant data starts at the 75-second mark and lasts about 20+ seconds):
[perf.data.perfparser.zip](https://github.com/godotengine/godot/files/11763700/perf.data.perfparser.zip)



### Steps to reproduce

1) Add 1000 nodes with a script attached.
2) Duplicate a node and witness lags.

Also affects scrolling the scene tree dock.

### Minimal reproduction project

[add_node_lags_repro.zip](https://github.com/godotengine/godot/files/11763731/add_node_lags_repro.zip)

Ref<Script> script = script_class_load_script(p_class);
	if (script.is_null()) {
		return StringName();
	}
	Ref<Script> base_script = script->get_base_script();
	if (base_script.is_null()) {
		return ScriptServer::get_global_class_base(p_class);
	}
	return script->get_language()->get_global_class_name(base_script->get_path());
}
Variant EditorData::script_class_instance(const String &p_class) {
	if (ScriptServer::is_global_class(p_class)) {
		Ref<Script> script = script_class_load_script(p_class);
		if (script.is_valid()) {
			
			Variant obj = ClassDB::instantiate(script->get_instance_base_type());
			if (obj) {
				obj.operator Object *()->set_script(script);
			}
			return obj;
		}
	}
	return Variant();
}
Ref<Script> EditorData::script_class_load_script(const String &p_class) const {