You can just touch the brakes to get almost all bars lit but be losing speed at a negligibly faster rate than by just coasting- almost no friction braking. So its almost as long as just coasting but with more charging.

By 'driving without brakes' or basically coasting as long and as often as possible your FE can stay very high. I used to shift into neutral to coast; I have found there to be very little change in FE doing that vs coasting in gear. Neutral keeps the engine at idle fuel consumption; coasting with the foot off shuts off the injectors. You don't coast as far in gear but are effectively using zero fuel.