Improve performance of CSharpLanguage::reload_assemblies

modules/mono/csharp_script.cpp

@@ -538,6 +538,10 @@ void CSharpLanguage::frame() {
 	if (gdmono && gdmono->is_runtime_initialized() && GDMonoCache::godot_api_cache_updated) {
 		GDMonoCache::managed_callbacks.ScriptManagerBridge_FrameCallback();
 	}
+
+#ifdef TOOLS_ENABLED
+	_flush_filesystem_updates();
+#endif
 }
 
 struct CSharpScriptDepSort {
@@ -1072,6 +1076,47 @@ bool CSharpLanguage::debug_break(const String &p_error, bool p_allow_continue) {
 }
 
 #ifdef TOOLS_ENABLED
+void CSharpLanguage::_queue_for_filesystem_update(String p_script_path) {
+	if (!Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
+
+	if (p_script_path.is_empty()) {
+		return;
+	}
+
+	pending_file_system_update_paths.push_back(p_script_path);
+}
+
+void CSharpLanguage::_flush_filesystem_updates() {
+	if (!Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
+
+	if (pending_file_system_update_paths.is_empty()) {
+		return;
+	}
+
+	// If the EditorFileSystem singleton is available, update the files;
+	// otherwise, the files will be updated when the singleton becomes available.
+	EditorFileSystem *efs = EditorFileSystem::get_singleton();
+	if (!efs) {
+		pending_file_system_update_paths.clear();
+		return;
+	}
+
+	// Required to prevent EditorProgress within EditorFileSystem from calling this while it is already flushing
+	if (is_flushing_filesystem_updates) {
+		return;
+	}
+	is_flushing_filesystem_updates = true;
+
+	efs->update_files(pending_file_system_update_paths);
+
+	is_flushing_filesystem_updates = false;
+	pending_file_system_update_paths.clear();
+}
+
 void CSharpLanguage::_editor_init_callback() {
 	// Load GodotTools and initialize GodotSharpEditor
 
@@ -2243,12 +2288,7 @@ void CSharpScript::reload_registered_script(Ref<CSharpScript> p_script) {
 	p_script->_update_exports();
 
 #ifdef TOOLS_ENABLED
-	// If the EditorFileSystem singleton is available, update the file;
-	// otherwise, the file will be updated when the singleton becomes available.
-	EditorFileSystem *efs = EditorFileSystem::get_singleton();
-	if (efs && !p_script->get_path().is_empty()) {
-		efs->update_file(p_script->get_path());
-	}
+	CSharpLanguage::get_singleton()->_queue_for_filesystem_update(p_script->get_path());
 #endif
 }
 
@@ -2621,12 +2661,7 @@ Error CSharpScript::reload(bool p_keep_state) {
 		_update_exports();
 
 #ifdef TOOLS_ENABLED
-		// If the EditorFileSystem singleton is available, update the file;
-		// otherwise, the file will be updated when the singleton becomes available.
-		EditorFileSystem *efs = EditorFileSystem::get_singleton();
-		if (efs) {
-			efs->update_file(script_path);
-		}
+		CSharpLanguage::get_singleton()->_queue_for_filesystem_update(script_path);
 #endif
 	}
 

modules/mono/csharp_script.h

@@ -434,6 +434,11 @@ class CSharpLanguage : public ScriptLanguage {
 	friend class GDMono;
 
 #ifdef TOOLS_ENABLED
+	Vector<String> pending_file_system_update_paths;
+	bool is_flushing_filesystem_updates = false;
+	void _queue_for_filesystem_update(String p_script_path);
+	void _flush_filesystem_updates();
+
 	EditorPlugin *godotsharp_editor = nullptr;
 
 	static void _editor_init_callback();