Most of my snakes digest between 3 and 4 days. I keep there warm side hides between 83-84Deg and they spend just about the whole time inside that hide. I give an extra 2 days past that 4th before I feed again just to be sure. I weigh in all my snakes before and after feeding and record that, On the next feeding I can see if my snakes are putting on weight and at what rate.
I weigh my mice and can adjust how much my snakes take in. This is a lot of work, I do however feel its important to take the extra steps to insure the healthy growth of my pets. This method isn't the only way and its not foolproof. I will say this tho I have never had health issues with my snakes and there vet visits prove they are rite where they should be for size, age and weight. This is what works for me it may not be for everyone vet visits are not cheap but they are a must to make sure you have healthy long living pets.
Joe