The versions used are listed in the benchmark image for almost all of the tests run. Here they are for R. Ubuntu 12: R v2.15.1 (2012-06-22) Ubuntu 16:

The versions used are listed in the benchmark image for almost all of the tests run. Here they are for R. Ubuntu 12: R v2.15.1 (2012-06-22) Ubuntu 16: R v3.5.1 (2018-07-02)