It's not comparing the architectures against each other, it's comparing language implementations against each other on those architectures. As x86-64 is the mos

It's not comparing the architectures against each other, it's comparing language implementations against each other on those architectures. As x86-64 is the most common x86 architecture nowadays, and ARMv7 the most common ARM architecture (at least on mobile), comparing language's performance on them should hopefully be more relevant as more developers use those platforms.