Optimizing Cherenkov Photons Generation and Propagation in CORSIKA for CTA Monte-Carlo Simulations. - Luisa Arrabito; Konrad Bernlöhr; Johan Bregeon; Matthieu Carrère; Adnane Khattabi; Philippe Langlois; David Parello; Guillaume Revy (Comput. Softw. Big Sci., 2020)