Performance optimization of the air shower simulation program for the Cherenkov Telescope ArrayLuisa Arrabito, Konrad Bernlöhr, Johan Bregeon, Gernot Maier, Philippe Langlois, David Parello and Guillaume RevyEPJ Web Conf., 214 (2019) 05041DOI: https://doi.org/10.1051/epjconf/201921405041