CLB supports SSL encryption and decryption through HTTPS. Its backend has multiple CVM instance clusters, where one single instance in one single cluster can achieve a full handshake performance of 65,000 QPS and a persistent connection performance of about 300,000 QPS.
Under normal circumstances, the HTTPS protocol adds at least one full handshake process due to the use of the SSL protocol, leading to an added delay of 2*RTT. In addition, SSL symmetric/asymmetric encryption consumes a lot of CPU resources, while the RSA's decryption capability is a major hurdle that prevents HTTPS implementation.
In contrast, the CLB-enabled HTTPS service eliminates the need to deploy services separately for SSL encryption and decryption with no additional fees, strengthening your business sustainability while increasing defense capabilities at no cost.