GCC 7.3 vs. GCC 8.0 vs. LLVM Clang 6.0 On The POWER9 Raptor Talos II

As part of the remote testing of the Raptor Talos II Workstation that is comprised of fully free software down to the firmware and powered by high-end POWER9 processors, over Easter weekend I carried out some GCC vs. Clang benchmarks...