ATLAS Grid Workflow Performance Optimization Johannes Elmsheuser, Alessandro Di Girolamo, Andrej Filipcic, Antonio Limosani, Markus Schulz, David Smith, Andrea Sciaba and Andrea Valassi EPJ Web Conf., 214 (2019) 03021 Published online: 17 September 2019 DOI: 10.1051/epjconf/201921403021