First `.request()` call slow

Using Jersey 3.1.1 (JAX-RS Client API) I noticed that the very first call to `.request()` needs between 500ms and 1000ms, while subsequent calls to `.request()` need 0 ms.

While this is not a problem when the Client API is called on a server (hence when a service calls into another service), as typically a lot of subsequent calls will be performed, it is a problem when the Client API is called from a CLI command. In my case, the command will perform *only* a single request!

What can an application programmer do to reduce this time?