@@ -456,28 +456,31 @@ handle_events(Uxn *u)

 static int

 run(Uxn *u)

 {

-	Uint64 now = SDL_GetPerformanceCounter(), frame_end, frame_interval = SDL_GetPerformanceFrequency() / 60;

+	Uint64 next_refresh = 0;

+	Uint64 now = SDL_GetPerformanceCounter();

+	Uint64 frame_interval = SDL_GetPerformanceFrequency() / 60;

 	for(;;) {

 		Uint16 screen_vector;

 		/* .System/halt */

 		if(u->dev[0x0f])

 			return system_error("Run", "Ended.");

-		frame_end = now + frame_interval;

+		now = SDL_GetPerformanceCounter();

 		exec_deadline = now + deadline_interval;

 		if(!handle_events(u))

 			return 0;

 		screen_vector = PEEK2(&u->dev[0x20]);

-		uxn_eval(u, screen_vector);

-		if(uxn_screen.x2)

-			redraw();

-		now = SDL_GetPerformanceCounter();

-		if(screen_vector) {

-			if(!BENCH && ((Sint64)(frame_end - now)) > 0) {

-				SDL_Delay((frame_end - now) / ms_interval);

-				now = frame_end;

-			}

-		} else

-			SDL_WaitEvent(NULL);

+		if(BENCH || now >= next_refresh) {

+			now = SDL_GetPerformanceCounter();

+			next_refresh = now + frame_interval;

+			uxn_eval(u, screen_vector);

+			if(uxn_screen.x2)

+				redraw();

+		}

+		if(BENCH);

+		else if(screen_vector || uxn_screen.x2) {

+			Uint64 delay_ms = (next_refresh - now) / ms_interval;

+			if(delay_ms > 0) SDL_Delay(delay_ms);

+		} else SDL_WaitEvent(NULL);

 	}

 }