GDScript: Reuse scripts from ResourceCache

Author: HolonProduction

modules/gdscript/gdscript_cache.cpp

@@ -304,6 +304,10 @@ Ref<GDScript> GDScriptCache::get_shallow_script(const String &p_path, Error &r_e
 	if (singleton->full_gdscript_cache.has(p_path)) {
 		return singleton->full_gdscript_cache[p_path];
 	}
+	// HACK:? Maybe the script should be in `full_gdscript_cache` as well and we only compensate for inconsistencies here.
+	if (const Ref<GDScript> &ref = ResourceCache::get_ref(p_path); ref.is_valid()) {
+		return ref;
+	}
 	if (singleton->shallow_gdscript_cache.has(p_path)) {
 		return singleton->shallow_gdscript_cache[p_path];
 	}
@@ -354,6 +358,15 @@ Ref<GDScript> GDScriptCache::get_full_script(const String &p_path, Error &r_erro
 		}
 	}
 
+	// HACK:? Maybe the script should be in `full_gdscript_cache` as well and we only compensate for inconsistencies here.
+	// If the script is in the `ResourceCache` it should fully loaded: see GH-109345. We check whether there is a shallow script anyway just to be sure.
+	if (!singleton->shallow_gdscript_cache.has(p_path)) {
+		script = ResourceCache::get_ref(p_path);
+		if (script.is_valid() && !p_update_from_disk) {
+			return script;
+		}
+	}
+
 	if (script.is_null()) {
 		script = get_shallow_script(p_path, r_error);
 		// Only exit early if script failed to load, otherwise let reload report errors.