Why is the Django admin slow?

Question

Django

Hello.
Forum topic model: text, forum name + one2one link to author model + forenkey link to comment model. There are about 500 topics in total.
In the admin panel, I open a list of all forum topics (pagination of 100 pieces on each page) -> I click on a topic and it loads for 5-8 seconds, after which the topic opens. On the site itself, the opening of the forum topic goes without any problem.
PostgreSQL database + standard admin panel + Grapelli skin

________

like_done - these are likes from other users.
Com_link is a tree of comments to build one under the other.

Answer 1

2.1 mb page seems to hint

Answer 2

Turn on caching and you will be happy.