Summary of Web Front-end optimization in the high-performance website construction guide:

All are front-end technologies:

1. Reduce HTTP requests and package all the packets that can be packaged together

2. Use CDN, rent or build your own, depending on the situation

3. Add the Expires header for long-term caching

4. compression component transmission, in addition to images and PDF

5. CSS is thrown at the top of HTML (it only looks fast, but the user is usually SB)

6. js throw at the bottom of HTML

7. Use CSS expressions as few as possible

8. Use external JS and CSS (cache)

9. Reduce DNS queries (cache)

10. Simplified JS

11. Less redirection

12. Avoid repeated scripts

13. Configure etag

(Next, we will analyze the useful technologies in detail. Here we will give you a research direction)