Which of the following actions would help optimize the performance of ProxySG?

Reducing the number of emulated certificates is a key action that can significantly optimize the performance of ProxySG. Emulated certificates are used to facilitate SSL/TLS decryption, which allows ProxySG to inspect the contents of encrypted traffic for security and policy enforcement purposes. However, managing a large number of emulated certificates can lead to overhead, as the system has to handle more information and processing during the HTTPS transaction.

By minimizing the number of emulated certificates, the ProxySG can streamline its operations. This reduction lowers the computational load, speeds up the handling of SSL/TLS sessions, and improves overall responsiveness. Optimizing the certificate management helps ensure that the proxy can serve requests more efficiently, ultimately enhancing the user experience and maintaining system performance.

While the other options might seem beneficial in certain contexts, they do not directly improve the specific performance issues surrounding SSL/TLS processing and may even introduce complexity or additional load on the system.