Very slow to display a simple page // How to debug?

Dear Community !! !
I discovered JMIX few day ago - and I must say I really enjoy this framework. Everything that I was looking for ! Close to the perfection
That’s why I tried to develop my first app only after following the Tutorial !!
Unfortunatly I got sow very bad answer when trying to display a simple ListView simply generated by the framework - he could take a long time …
I try to run the console in my browser to understand … but unfortunately I can only see that the sending XHR message take sometime more than 10 sec …
Sending xhr message to server:
{“csrfToken”:“6dced48e-80d9-415d-a619-77d08a46ee39”,“rpc”:[{“type”:“event”,“node”:1,“event”:“ui-navigate”,“data”:{“route”:“legalEntities”,“query”:"",“appShellTitle”:"",“historyState”:{“usr”:null,“key”:“wdyxvrbd”,“idx”:2},“trigger”:“client”}}],“syncId”:7,“clientId”:7} FlowClient-B-FuFaal.js:759:10
Server visit took 6411ms
Is that normal ? is it because we are in debug mode ?
Can someone help me to solve this ?

I already try to create a more simple object … I have 2 records !!!

Thanks in advance for your help.

Hello,
something is definitely not good, Jmix is usually fast.
Can you link us your example project?
Or maybe just try to run some examples to see how its done and then compare:
https://www.jmix.io/live-demo/
Maybe start with the Petcliniic.

Kind regards,
Mladen