crawl nutrition index

item	weight (AUM)	cost (gold)	eating time (turns)	nutrition/weight							nutrition/weight/cost							nutrition/time
				normal ↓	carnivore			herbivore			normal	carnivore			herbivore			normal	carnivore			herbivore
				normal ↓	1	2	3	1	2	3	normal	1	2	3	1	2	3	normal	1	2	3	1	2	3
potion of porridge	4.0	10	1	1510	1510	1510	1510	1510	1510	1510	151	151	151	151	151	151	151	6040	6040	6040	6040	6040	6040	6040
royal jelly	5.5	120	1	~909	~909	~909	~909	~909	~909	~909	~8	~8	~8	~8	~8	~8	~8	5000	5000	5000	5000	5000	5000	5000
beef jerky	2.0	18	1	750	850	950	1050	650	550	450	~42	~47	~53	~58	~36	~31	25	1500	1700	1900	2100	1300	1100	900
sultana	0.1	1	1	700	500	300	100	900	1100	1300	700	500	300	100	900	1100	1300	70	50	30	10	90	110	130
meat ration	8.0	40	4	625	~688	750	~813	~438	250	~63	~16	~17	~19	~20	~11	~6	~2	1250	1375	1500	1625	875	500	125
lychee	1.0	4	1	600	400	200	0	800	1000	1200	150	100	50	0	200	250	300	600	400	200	0	800	1000	1200
rambutan	1.0	4	1	600	400	200	0	800	1000	1200	150	100	50	0	200	250	300	600	400	200	0	800	1000	1200
bread ration	8.0	40	4	550	425	300	175	~613	675	~738	~14	~11	~8	~4	~15	~17	~18	1100	850	600	350	1225	1350	1475
honeycomb	4.0	25	1	500	500	500	500	500	500	500	20	20	20	20	20	20	20	2000	2000	2000	2000	2000	2000	2000
orange	2.0	12	1	500	350	200	50	650	800	950	~42	~29	~17	~4	~54	~67	~79	1000	700	400	100	1300	1600	1900
banana	2.0	12	1	500	350	200	50	650	800	950	~42	~29	~17	~4	~54	~67	~79	1000	700	400	100	1300	1600	1900
lemon	2.0	12	1	500	350	200	50	650	800	950	~42	~29	~17	~4	~54	~67	~79	1000	700	400	100	1300	1600	1900
grape	0.2	1	1	500	400	300	200	600	700	800	500	400	300	200	600	700	800	100	80	60	40	120	140	160
apricot	1.5	8	1	~467	~333	200	~67	600	~733	~867	~58	~42	25	~8	75	~92	~108	700	500	300	100	900	1100	1300
strawberry	0.5	1	1	400	300	200	100	500	600	700	400	300	200	100	500	600	700	200	150	100	50	250	300	350
slice of pizza	4.0	18	1	375	375	375	375	375	375	375	~21	~21	~21	~21	~21	~21	~21	1500	1500	1500	1500	1500	1500	1500
apple	2.0	8	1	350	250	150	50	450	550	650	~44	~31	~19	~6	~56	~69	~81	700	500	300	100	900	1100	1300
pear	2.0	8	1	350	250	150	50	450	550	650	~44	~31	~19	~6	~56	~69	~81	700	500	300	100	900	1100	1300
sausage	4.0	15	1	300	350	400	450	25	200	150	20	~23	~27	30	~2	~13	10	1200	1400	1600	1800	100	800	600
cheese	4.0	15	1	300	300	300	300	300	300	300	20	20	20	20	20	20	20	1200	1200	1200	1200	1200	1200	1200
snozzcumber	5.0	4	1	300	260	220	180	340	380	420	75	65	55	45	85	95	105	1500	1300	1100	900	1700	1900	2100
choko	3.0	4	1	200	~133	~67	0	~267	~333	400	50	~33	~17	0	~67	~83	100	600	400	200	0	800	1000	1200
chunk	10.0	4	3	100	110	120	130	50	0	0	25	~28	30	~33	~13	0	0	~333	~367	400	~433	~167	0	0
potion of water	4.0	1	1	15	15	15	15	15	15	15	15	15	15	15	15	15	15	60	60	60	60	60	60	60

so what does all this mean?

When eating, eat the item with the lowest nutrition/weight ratio (for your mutation level) first. This way you pack more nutrition per what you can carry (Always eat chunks first, since they rot)
Stash your high nutrition/weight ratio (for your mutation level) food for later for farming the abyss/pan/zigs where you need to reserve carrying capacity for loot
When you're buying food from a shop, always buy the item with the highest nutrition/weight/cost ratio (for your mutation level)
- Sultanas, grapes and strawberries are pretty much the most efficient food items to buy under any mutation level
Honeycombs actually have a bad nutrition/weight ratio for herbivores! So when playing a Spriggan and you raid the Hive, eat the honeycombs before your other fruit!
- On the other hand, for carnivores honeycombs are actually at the top of the list, so do save them for later
Potions of porridge are hands-down the best food item in Crawl in every aspect; High nutrition, low weight, fast eat
Beef jerky is a great snack if you need to eat in a hairy situation. If you have none, honeycombs are the next best thing