https://github.com/raspberrypi/linux/issues/3648 [jfikar](https://github.com/jfikar) commented [on Jun 15, 2020](https://github.com/raspberrypi/linux/issues/3648#issuecomment-644251745)• I'm running custom arm64 kernel 5.4.45 with Adiantum enabled. CONFIG_CRYPTO_ADIANTUM=m CRYPTO_NHPOLY1305_NEON=m The speed on RPi4 is cryptsetup benchmark -c xchacha20,aes-adiantum # Tests are approximate using memory only (no storage IO). # Algorithm | Key | Encryption | Decryption xchacha20,aes-adiantum 256b 211.1 MiB/s 214.1 MiB/s cryptsetup benchmark -c xchacha12,aes-adiantum # Tests are approximate using memory only (no storage IO). # Algorithm | Key | Encryption | Decryption xchacha12,aes-adiantum 256b 256.6 MiB/s 258.2 MiB/s While AES gives only cryptsetup benchmark -c aes-xts -s 256 # Tests are approximate using memory only (no storage IO). # Algorithm | Key | Encryption | Decryption aes-xts 256b 71.0 MiB/s 60.6 MiB/s Please, enable also the second option I mentioned CRYPTO_NHPOLY1305_NEON, without it the speed is only cryptsetup benchmark -c xchacha20,aes-adiantum # Tests are approximate using memory only (no storage IO). # Algorithm | Key | Encryption | Decryption xchacha20,aes-adiantum 256b 127.4 MiB/s 128.6 MiB/s cryptsetup benchmark -c xchacha12,aes-adiantum # Tests are approximate using memory only (no storage IO). # Algorithm | Key | Encryption | Decryption xchacha12,aes-adiantum 256b 160.9 MiB/s 160.9 MiB/s