> what accounts for a large part of the performance gap with x86 is the fact Apple's compilers can target their specific microarchitecture and optimize for that

> what accounts for a large part of the performance gap with x86 is the fact Apple's compilers can target their specific microarchitecture and optimize for that, because they know its performance characteristics well. OP is running Arch though, which is probably built with gcc/clang targeting generic ARMv8(.0?).