There is no hard data.
You could keep doing it the way you do, or you could do it somewhat randomly, that would perhaps be a little more hunter gatherly.
For example, you could mix in days where you eat lightly but non-IF, followed by a day where you eat heavy and non-IF, followed by a day where you eat lightly but IF, and a day where you IF but eat heavily, then a day where you don't eat at all.
So, there are four different eating stategies:
1.) IF and eat few calories
2.) IF and eat a lot of calories
3.) Eat a few calories in a non-IF fashion
4.) Eat a lot of calories in a non-IF fashion
(1) is where your hunt for the day was poor but you did bring back something. (2) is where your hunt was very successful. (3) is where your hunt was so successful from the previous day that you have leftovers but you didn't feel like hunting today. (4) is where your hunt was so successful from the previous day that you had a ton of food left.
Just make sure you follow a light eating day with a heavy eating day.