Note that clang's arm64 backend is faster, presumably because it has less optimizations than the x86-64 one. So even comparing clang on an intel mac and clang o

Note that clang's arm64 backend is faster, presumably because it has less optimizations than the x86-64 one. So even comparing clang on an intel mac and clang on arm64 mac would be skewed. You'd want to cross-compile on one of them for a better comparison relevant to CPU performance. There is still value on comparing native compilation, though.