Web page loading speed suddenly slows down

At the beginning of last weekend, the loading speed of the main part of the website suddenly became very slow, and the webpage loading was completed in about 5-6 minutes. However, the forum page of the website loads normally. I would like to ask the webmaster, what is the cause?
Thank you

The response time for any web site is dependent on a whole host of factors so it's impossible to give you a meaningful response. Connecting is not direct but involves a series of 'hops' and any one of those can cause a potential delay. Personally, I've not observed the slowness you describe and we've had no other reports of it so it may well be something relating to your own location or setup. The main website and forum are both located on the same server.