Why is CrUX data different from my RUM data?
Learn about reasons why RUM data can show different Core Web Vitals numbers from CrUX.
Performance
Our latest news, updates, and stories about Performance.
How the BBC is rolling out HSTS for better security and performance.
The BBC is rolling out HSTS for their website to improve security and performance. Find out what it means, and how HSTS can help you.
How GoDaddy's Websites + Marketing service improved customer Core Web Vitals by 75%
A case study of changes GoDaddy implemented to improve website performance for millions of sites, helping them to achieve good PageSpeed Insights and Core Web Vitals scores.
GOV.UK drops jQuery from their front end.
GOV.UK dropped their jQuery dependency from their front end. You'll never
guess what happened. (Yes, you will.)
Don't fight the browser preload scanner
Find out what the browser preload scanner is, how it helps performance, and how you can stay out of its way.
Make your site picture perfect with images.tooling.report
Check out the state of image tooling.
Deep-copying in JavaScript using structuredClone
The Platform now ships with structuredClone(), a built-in function for deep-copying.
What's new in PageSpeed Insights
Learn about the latest in PageSpeed Insights to help you better measure and optimize your page and site quality.
Feedback wanted: An experimental responsiveness metric
An update on our plans for measuring responsiveness on the web.
Lighthouse user flows
Try out a new Lighthouse API to measure performance and best practices throughout a user flow.
Towards an animation smoothness metric
Learn about measuring animations, how to think about animation frames, and overall page smoothness.
Optimizing resource loading with Priority Hints
Priority hints indicate the relative priority of resources to the browser. They can enable optimal loading and improve Core Web Vitals.
Assessing loading performance in the field with Navigation Timing and Resource Timing
Learn the basics of using the Navigation and Resource Timing APIs to assess loading performance in the field.
Best practices for using third-party embeds
An overview of techniques to load popular third-party embeds efficiently.
How Swappie increased mobile revenue by 42% by focusing on Core Web Vitals
Finding correlation between site performance and business metrics was the key to driving the success of their optimization efforts.
How SPA architectures affect Core Web Vitals
Answers to common questions about SPAs, Core Web Vitals, and Google's plan to address current measurement limitations.
Why lab and field data can be different (and what to do about it)
Learn why tools that monitor Core Web Vitals metrics may report different numbers, and how to interpret those differences.
Core Web Vitals workflows with Google tools
Combine Google tools to audit, improve and monitor your website effectively.
Best practices for tags and tag managers
Optimize tags and tag managers for Core Web Vitals.
How committing to Core Web Vitals increased Netzwelt's advertising revenues by 18%
The relaunched website also sees ad viewability of over 75%, bounce rates reduced by 50%, and page views up by 27%.
The performance effects of too much lazy-loading
Data-driven advice for lazy-loading images with Core Web Vitals in mind.
Using WebAssembly threads from C, C++ and Rust
Learn how to bring multithreaded applications written in other languages to WebAssembly.
