The UI at perp.exchange depends on several parts in order to function, some of which may cause delays or fail to load for some users.
If the UI is lagging, it is possible that you are unable to connect to the automatically assigned xDai node.
Manually switch xDai node using the node menu ⚙️ in the upper right corner of the UI.
Note that this bypasses the load balancing infrastructure and will only help you if you are unable to connect properly to the automatically assigned node (ie. UI is not loading at all).
There is no need to switch Eth node. Ethereum nodes at used only for deposits.
If you are unable to deposit, it is likely that your connection to the Ethereum node is experiencing issues.
Manually switch ETH node using the node menu ⚙️ in the upper right corner of the UI.
Note that this bypasses the load balancing infrastructure and will only help you if you are unable to connect properly to the automatically assigned node (ie. deposit/approve function is not working at all).