W3C

The Web Performance Working Group has published a Working Draft of Frame Timing, which now uses a slow-only frames strategy. This specification defines an interface for web applications to access runtime performance information of the browser event loop, enabling them to identify and fix issues that cause delayed rendering, processing of input, and other critical work necessary to deliver a smooth and responsive user experience.

The HTML Working Group has published a Proposed Recommendation of HTML Canvas 2D Context. This specification defines the 2D Context for the HTML canvas element. The 2D Context provides objects, methods, and properties to draw and manipulate graphics on a canvas drawing surface. Comments are welcome through 21 October.

The Web Applications Working Group has published a Working Draft of Web Workers. This specification defines an API that allows Web application authors to spawn background workers running scripts in parallel to their main page. This allows for thread-like operation with message-passing as the coordination mechanism.

The Web Performance Working Group has published two documents:

• A Working Draft of Beacon: This specification defines an interoperable means for site developers to asynchronously transfer small HTTP data from the User Agent to a web server.
• A Group Note of 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. The user agent is in a better position to determine the ideal animation rate based on whether the page is currently in a foreground or background tab, what the current load on the CPU is, and so on. Using this API should therefore result in more appropriate utilization of the CPU by the browser.