Original Post from Ilya Grigorik: A quick course on the Critical Rendering Path: http://bit.ly/1soxBEB - learn how the browser converts HTML, CSS, and JavaScript into pixels on the screen, and how to use DevTools to measure and optimize your pages to render in 1s or less! Had a blast making this course with Udacity. Check it out, let me know how it goes!  Web Perf Commercial - mjc