I have used until now this library for ed25519 signing and verifying - https://hexdocs.pm/ed25519/Ed25519.html#content. However, I am not pleased with the library at all. The signing time is 100-120ms and the validating of a signature 150-190ms, which I think could be better. Moreover, I am unable to extract the hash (sha512) used for the signature, which I would really like to have separately.
Do you have any recommendations on a better library for ed25519?