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Web Performance Current Status

This page summarizes the relationships among specifications, whether they are finished standards or drafts. Below, each title links to the most recent version of a document. For related introductory information, see: JavaScript Web APIs.

Completed Work

W3C Recommendations have been reviewed by W3C Members, by software developers, and by other W3C groups and interested parties, and are endorsed by the Director as Web Standards. Learn more about the W3C Recommendation Track.

Group Notes are not standards and do not have the same level of W3C endorsement.

Standards

2013-05-14

Page Visibility

translations · errata

This specification 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.
2012-12-17

Navigation Timing

translations · errata

This document provides an interface for web applications to access timing information related to navigation and elements.
2012-12-17

High Resolution Time

translations · errata

This specification defines an interface that provides the current time in sub-millisecond resolution and such that it is not subject to system clock skew or adjustments.

Drafts

Below are draft documents: Candidate Recommendations, Last Call Drafts, other Working Drafts. Some of these may become Web Standards through the W3C Recommendation Track process. Others may be published as Group Notes or become obsolete specifications.

Candidate Recommendations

2012-07-26

User Timing

This specification defines an interface to help web developers measure the performance of their applications by giving them access to high precision timestamps.

2012-07-26

Performance Timeline

This specification defines an interface for web applications to access timing information related to navigation and elements. It is used by other specifications, like User Timing.

2012-05-22

Resource Timing

This specification defines an interface for web applications to access timing information related to HTML elements.

Last Call Drafts

2012-02-21

Timing control for script-based animations

This document defines an API web page authors can use to write script-based animations where the user agent is in control of limiting the update rate of the animation.

Other Working Drafts

2013-01-31

Navigation Timing 2

This document provides an interface for web applications to access timing information related to navigation and elements.