Performance and Integration Scheme of Range-Separated Hybrids

I’ve been familiarizing myself with the code involved in calculating JK builds in Psi4. From what I can tell, Psi4 does separate integrals for K before and after the range separation cutoff, then applies the alpha and beta coefficients in the solver, for example UHF. Is this correct? Would I be correct in assuming that this doubles the time associated with the K build or are there optimizations that I don’t know about?