u/Moist-Decision-1369

A few months back I created a website. Used "webhostpython.com" for the host. And I used python Flask for the backend, while in localhost, the website was incredibly fast at loading which makes sense. however, when I launched it publicly, the website was incredibly slow, without the cache, the website would take more than 10 seconds to load a single page. Now I am about to work on another website and I don't want to have the same failure that will cost me a lot. What did I do wrong to make it so incredibly slow?