This is only true for Intel and AMD x86_64 servers that have hardware accelerated AES with the AES-NI instruction set. Software implementations of AES and the o

This is only true for Intel and AMD x86_64 servers that have hardware accelerated AES with the AES-NI instruction set. Software implementations of AES and the other ciphers are much, much slower than AES with hardware acceleration. RC4 was the fastest decent software cipher for a while, but that has been found to be insecure and its use is discouraged. The fastest possible replacement would probably be ChaCha20, but that cipher is not widely supported yet. The other software ciphers are very slow, and certainly wouldn't be considered as "fast yet".