SSH ciphers speed comparison

script

# uses "/root/tmp/dd.txt" as a temporary file!
ciphers="aes128-ctr aes192-ctr aes256-ctr aes128-gcm@openssh.com aes256-gcm@openssh.com chacha20-poly1305@openssh.com"
for cipher in $ciphers ; do
    for i in 1 2 3 ; do
        echo
        echo "Cipher: $cipher (try $i)"
        dd if=/dev/zero bs=4M count=1024 2>/root/tmp/dd.txt | pv --size 4G | time -p ssh -c "$cipher" root@localhost 'cat > /dev/null'
        grep -v records /root/tmp/dd.txt
    done
done

init :

ssh-keygen
cat .ssh/id_rsa.pub > .ssh/authorized_keys

Host

• OpenSSH_6.7p1 Debian-5, OpenSSL 1.0.1k 8 Jan 2015
• pve-manager/4.1-2/78c5f4a2 (running kernel: 4.2.6-1-pve)
• OpenSSL 1.0.1k 8 Jan 2015