NetlifyCMS is slow after upgrade

We have a large CMS configuration with over 30000 lines of config for one of our websites. This is a self hosted NetlifyCMS instance.

After upgading to the latest version, the CMS is loading slowly. I think this has to do with the newly introduced configuration check. Like the upgrade forced us to clean up the configuration file but since then it is also loading very slowly.

Is there anybody in this forum who could have a look at our setup against a payment to figure out if there are ways to fix this? Please DM me.

Thanks!
Laurent