Is Kibana Space causing long time to load?

In our Kibana setup we are creating multiple space (8 to be specific) and adding dashboards to it. When we load those dashboard as embedded link in Iframe of our application, dashboard are taking long time to load.

Want to ask if we move all the dashboards out of spaces and put them in default without any space in the kibana does that help in increasing the performance of load time. We are not using any specific feature of the spaces at this time, we did that to make our dashboard grouped together in logical groups.

Asking this here before involving the team to make all those changes. If someone faced same issue and did something in same direction.

Using ELK stack 7.6.2.

Hello,

I am pretty sure spaces aren't contributing to your problem.
Do you have a way of measuring how long are your dashboards taking to load?

Thanks,
Bhavya