Hello,
While such tests are not available, the AES-GCM is newer than AES-CBC and should provide better performance in terms of throughput.
Generally, stronger encryption algorithms require more processing power and may slow down the encryption speed. For example, AES-128-CBC encryption algorithm may offer lower encryption strength compared to AES-256-CBC, but it can provide faster encryption speeds.
So the choice will depend on your needs.
Kind Regards,
Andzej