Improve ping & memory plz


It can be a location problem. All your devices likely take a similar (or same) path to the Live servers so any issues on part of that path can cause lag. The site can only impact a small portion and how the client connects.
https://support.chess.com/customer/en/portal/articles/1444918-my-internet-connection-is-fine---why-am-i-getting-disconnects-
https://www.chess.com/blog/News/how-to-adjust-your-live-chess-connection
Both of those links have suggestions that may improve your lag issues.