GCC 12 Compiler Optimization Tuning With The AMD Ryzen Threadripper 3990X

GCC 12 Compiler Optimization Tuning With The AMD Ryzen Threadripper 3990X: Following the recent discussions about -O3'ing the Linux kernel and other compiler optimizations, a request came in to see some fresh GCC compiler optimization benchmarks with the recently released GCC 12. So here is a fresh look at various GCC optimization levels up through -Ofast as well as with link-time optimizations (LTO) and "-march=native" tuning on the new GCC 12 with the mature AMD Ryzen Threadripper 3990X platform.