Sorry, bit late to the party. Eat a pizza and the energy will only come into your body in (as far as I've learned) a few hours. Eating a pizza is hard on your digestion. That why we usually go to sleep a few hours after are largest meal. We give our body the time to digest the energy and wake up fresh.

(from AI overview) "The human body can absorb and process about 60 to 90 grams of carbohydrates (roughly 240 to 360 calories) per hour during exercise when using a single or mixed source of sugars" And that's for your 14? waking hours. With another conundrum looking around the corner - work out or basicly: burn more calories, and you need more sleep.

Your body is constantly calomaxxing. Eat two pizzas (hey, once in my 20s I could as well!) and your digestion is working for the next 10-15 hours.