Browser Rendering Optimization

Online Course

Browser Rendering Optimization

What is the course about?

Browser Rendering Optimization
The course Browser Rendering Optimization is an online class provided by Udacity. The skill level of the course is Advanced. It may be possible to receive a verified certification or use the course to prepare for a degree.

Performance matters to users. Web developers need to build apps that react quickly and render smoothly.

Course description
  • Browser Rendering Optimization
  • 1 months
  • Building 60 FPS Web Apps
  • Google performance guru Paul Lewis is here to help you destroy jank and create web apps that maintain 60 frames per second performance.
  • You’ll leave this course with the tools you need to profile apps and identify the causes of jank. You’ll explore the browser’s rendering pipeline and uncover patterns that make it easy to build performant apps.
  • The Critical Rendering Path
  • App Lifecycles
  • Weapons of Jank Destruction
  • JavaScript
  • Styles and Layout
  • Compositing and Painting
  • Introduction to the course with Paul Lewis.
  • Learn how the browser turns HTML into pixels on the page
  • See how different CSS styles affect the rendering pipeline differently.
  • How to recognize the four distinct phases in an app’s lifecycle: Response, Animation, Idle and Load (RAIL).
  • How your frame budget changes depending on where the user is in RAIL.
  • Practice thinking through app workloads at different stages in RAIL.
  • How to make sense of the Timeline panel in Chrome DevTools.
  • Practice profiling a few different apps to find the source of jank.
  • How to optimize JavaScript to hit 60fps during animations.
  • How to move expensive JavaScript operations off the main thread and into Web Workers.
  • How to debug a janky copy of a production quality app – the QR Snapper.
  • Learn how accessing the wrong CSS properties can create loads of extra work for the browser.
  • Learn how to debug multiple instances of Forced Synchronous Layout.
  • Practice profiling layer and paint performance with the paint profiler tool in the DevTools Timeline.
  • Learn how to optimize layers to reduce the number of steps the browser needs to take to render each frame.
  • Demonstrate everything you’ve learned about performance as you de-jankify the News Aggregator App!
  • See the Technology Requirements for using Udacity.
  • Demystifying the browser’s rendering pipeline will make it easy for you to build high performance web apps. By following a few simple principles, you’ll be capable of drastically reducing the browser’s workload and time needed to render each frame.
  • You’ll start by getting introduce to the individual steps of the rendering pipeline, beginning with parsing HTML and ending with painting pixels on the screen. Then you’ll quickly dive into tooling with ample opportunities to practice profiling and debugging apps with Chrome Developer Tools.
  • The final project uses the Hacker News API and gives you an opportunity to show off everything you’ve learned as you turn an awful experience into a high performance web app!

Prerequisites & Facts

Browser Rendering Optimization

Course Topic

Computer Science, Programming

University, College, Institution


Course Skill Level


Course Language


Place of class

Online, self-paced (see curriculum for more information)



Degree & Cost

Browser Rendering Optimization

To obtain a verified certificate from Udacity you have to finish this course or the latest version of it, if there is a new edition. The class may be free of charge, but there could be some cost to receive a verified certificate or to access the learning materials. The specifics of the course may have been changed, please consult the provider to get the latest quotes and news.
Browser Rendering Optimization
provided by Udacity


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School: Udacity
Topic: Computer Science, Programming