Make Copies of Calculators Optional #70
Description
Currently, Behavioral-Responses makes three copies of the calculator objects passed as arguments to the response function. The first two are made right when the function starts running, and the third occurs further along when adding the behavioral-response changes to income.
It's clear why we would want to make a copy before changing income, and I can see an argument for why we would want to make copies of the original copies from the beginning. However, could we add an argument to the responses function that makes creating these copies optional? From what I can see, there are no modifications being made to the calc1 and calc2 variables, only the copy of calc2. Of course I could be missing something obvious.
Making the copies optional would significantly reduce the amount of memory needed for partial equilibrium simulations, which would be especially helpful in Tax-Brain.
cc @hdoupe