Udacity has some really awesome free courses from Google devs about this: Website Performance Optimization[1] and Browser Rendering Optimization[2] [1]: https:

Udacity has some really awesome free courses from Google devs about this: Website Performance Optimization[1] and Browser Rendering Optimization[2] [1]: https://www.udacity.com/course/website-performance-optimization--ud884 https://www.udacity.com/course/website-performance-optimizat... [2]: https://www.udacity.com/course/browser-rendering-optimization--ud860 https://www.udacity.com/course/browser-rendering-optimizatio...