You can edit your split layout and add a secondary timer next to the original timer, then have one compare against Real Time, and the other compare against Game Time. You can also just right-click the splits and click on Compare Against -> Real Time. I would recommend the dual timer method, because submissions are required to have the loadless timer visible during the entire run until completion, so the two timers visible at all times rules out any mistakes with the timer that could possibly invalidate your loadless times.