Very slow homepage loading after login

Hi, after login, it takes 10-15 sec to load homepage everytime (on desktop). Please look at the capscreen of waiting time for server response: https://tinypic.host/image/%E5%BE%AE%E4%BF%A1%E6%88%AA%E5%9C%96-20231203145157.XyYld

There is no problem for guest. It only happens after login. How can I fix it?

Thanks