W3C

Web Performance Working Group

What is Web Performance?

Methods to store and retrieve high resolution performance metric data, aka the performance timeline. Read our primer.

Your User Agent:

Navigation Timing:
Redirect:	?ms
App cache:	?ms
DNS lookup:	?ms
TCP Connection:	?ms
TCP Request:	?ms
Processing:	?ms
Total page load:	?ms

Resource Timing:
	images:	?ms
	links:	?ms
	scripts:	?ms
	CSS:	?ms

            Our MissionThe mission of
the Web Performance Working Group is to provide methods to measure aspects of application
performance of user agent features and APIs.
The Co-Chairs of the Working Group are
              Ilya Grigorik and
              Todd Reifsteck. The W3C Team Contact for the Web Performance Working Group are
              Philippe Le Hégaret and Xiaoqian Wu.
              
                We have a primer for Web Performance Timing APIs. That's a good introduction for you.
              
            Real-world RAIL (Response, Animation, Idle, Load)
                Ilya Grigorik presented on Quantify and improve real-world RAIL during the Chrome Dev Summit 2015. Check it out as a good introduction to the work done in the Web Performance Working Group.
              
            High Resolution Time Level 2 is ready
                We intend to ship a revision of High Resolution Time that includes a proper definition for time origin and worker support. Check it out and send us feedback.

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