The   Web Performance Working Group   invites implementations of two Candidate Recommendation Snapshots: User Timing  defines an interface to help web developers measure the performance of their applications by giving them access to high precision timestamps. Performance Timeline  extends the High Resolution Time specification [ HR-TIME-3 ] by providing methods to store and retrieve high resolution performance metric data. Introduction: Mastering Digital Growth in 2025—From SEO to Social Media and AI In 2025, digital success isn’t just about having an online presence—it’s about strategically connecting the dots between SEO, web design, content creation, and social media. For small businesses and marketers alike, staying ahead means embracing the latest tools and trends that shape how we rank, engage, and grow online. Whether you're aiming to  win local search  with cutting-edge  SEO for Small Business in 2025: How to Win Local Search and Drive G...

8 December 2016 The  Web Performance Working Group  invites implementation of the Candidate Recommendation of  Performance Timeline Level 2 . This specification extends the High Resolution Time specification by providing methods to store and retrieve high resolution performance metric data. Accurately measuring performance characteristics of web applications is an important aspect of making web applications faster. This specification defines the necessary Performance Timeline primitives that enable web developers to access, instrument, and retrieve various performance metrics from the full lifecycle of a web application.

26 July 2012 The Web Performance Working Group invites implementation of three Candidate Recommendations: Page Visibility which defines a means for site developers to programmatically determine the current visibility state of the page in order to develop power and CPU efficient web applications. Performance Timeline which defines an unified interface to store and retrieve performance metric data. This specification does not cover individual performance metric interfaces. User Timing which defines an interface to help web developers measure the performance of their applications by giving them access to high precision timestamps. Learn more about the Rich Web Client Activity .

The Web Performance Working Group has published Last Call Working Drafts of Performance Timeline and User Timing . The former defines an interface for web applications to access timing information related to navigation and elements. The latter defines an interface to help web developers measure the performance of their applications by giving them access to high precision timestamps. Comments are welcome through 22 September. Learn more about the Rich Web Client Activity . Learn JavaScript and Ajax with w3Schools