Sufficient side-channel resistance for real world uses, sufficient GPU resistance. It's the best of both worlds. It's also going to be the libsodium default in

Sufficient side-channel resistance for real world uses, sufficient GPU resistance. It's the best of both worlds. It's also going to be the libsodium default in the next release. It's literally two passes that are memory independent, then two that are memory dependent, when r = 4.