Well, I just recalculated everything. If you’re really skinny (0 stored calories), tiny (145 cm & “tiny” mutation, making you 45 cm small), of old age (the older, the better, but the max possible setting is 55 years in character generation), with no additional mutations, bionics, artifacts or changes to PLAYER_HUNGER_RATE… You’d use up around 0.6 kcal every 5 minutes or 6 kcal for the whole crafting process (not taken into calculation that it would take much longer when you’re starving), so you could profit from that… if you’d live to see the result, that is…
On the other hand… Eating to the max and getting a bmi of 468555 (2147483647 stored kcal), at full hight of 3 meters (2 meters + mutation “huge”) and at an age of 16, you’d loose 658933 kcal every 5 minutes or 6,589,330 kcal while crafting this.
And an other night wasted on stupid calculations and testing… Why do I keep doing this to myself?
Edit: Here are the values I used for the calculation (function name taken from source code):
get_bmr = 170 to 189772830
base_bmr_calc = 169.0875 to 189772829.080363629
height = 45 to 300
age = 16 to 55+ (you age “normally” as the game progresses)
bodyweight = 26.325 to 42169939.795636362
get_bmi = 13 to 468554.8866181818
get_kcal_percent = 0 to 39045.15721818182
Fun fact: If you actually manage to get to 2147483647 stored kcal, you’ll probably die of starvation, as it will overflow, turning into negatives (possible explanation: at that point you probably violently exploded and have therefore 0 fat left in your carcass body).
Second fun fact: I don’t see anything stopping you from reaching an age of 65+ at which, with almost no fat reserves and the smallest possible height, you’d never again need to eat, as you will actually gain kcal just from existing and even more from exercising. Just… don’t do anything that modifies your stored calories directly, like digging/mining or cutting wood… or you’ll starve to death.
Indeed. That’s one side effect I didn’t consider. You’d probably still be better off to spin cotton balls into thread, but it’s nice to basically have “free” plant fiber.