Very slow in Category view list when I added arround 30 custom fields for article

[wilsontse88]

I would like to ask....why the category list view page loading time is very slow (around 20sec if i have 200 article in category list) .

I have added around 30 custom fields for 1 article. Anyone can tell me how to solve it ??

the screen capture is about when I custom fields added in 1 category article