I am new to service sent events, as far as I know it is like notifications that are sent from server to client once connection is established. I would like to know if it possible to test performance such a thing
Instead, if you require more, the main blocker (the event loop) has been implemented in k6 but we haven’t yet developed the specific implementation for SSE.
However, you could consider implementing it as an extension using the event loop API, you can use as an example the https://github.com/grafana/xk6-websockets extensions for checking how to use it.
Let me know if it helps.