How to do Magento 2 performance optimization ?

Magento 2 is a pretty complex application. If you did not configure it correctly you will find it very slow. To do performance optimization, I am adding some pointers here as follows.

1. Image optimization and lazy loading
2. JavaScript optimization
3. Font Optimization
4. CSS optimization
5. Caching techniques
6. Server optimization
7. Latest version of everything
8. Light Weight theme
9. Production mode
10. Database optimization
11. Code optimization
12. Disable non required module
13. Latest protocol http2
14. Using Facade pattern for chat loader
15. Serving static data from non cookie domain