### 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)

if (!ScriptServer::is_global_class(p_class)) {
		return Ref<Script>();
	}
	String path = ScriptServer::get_global_class_path(p_class);
	return ResourceLoader::load(path, "Script");
}
void EditorData::script_class_set_icon_path(const String &p_class, const String &p_icon_path) {
	_script_class_icon_paths[p_class] = p_icon_path;
}
String EditorData::script_class_get_icon_path(const String &p_class) const {
	if (!ScriptServer::is_global_class(p_class)) {
		return String();
	}
	String current = p_class;
	String ret = _script_class_icon_paths[current];
	while (ret.is_empty()) {
		current = script_class_get_base(current);
		if (!ScriptServer::is_global_class(current)) {
			return String();
		}
		ret = _script_class_icon_paths.has(current) ? _script_class_icon_paths[current] : String();
	}
	return ret;
}
StringName EditorData::script_class_get_name(const String &p_path) const {