RDataFrame: Easy Parallel ROOT Analysis at 100 Threads Danilo Piparo, Philippe Canal, Enrico Guiraud, Xavier Valls Pla, Gerardo Ganis, Guilherme Amadio, Axel Naumann and Enric Tejedor EPJ Web Conf., 214 (2019) 06029 Published online: 17 September 2019 DOI: 10.1051/epjconf/201921406029