Microsoft informst that "W3C formed a new Web Performance Working Group chartered with making it easier to accurately measure web app performance. Enabling web developers to understand the real world performance characteristics of their app is critical to the success of HTML5, and Microsoft and Google have been selected as co-chairs of the new working group. We look forward to partnering with W3C and the broader web community to enable these scenarios through an interoperable API."
"The first deliverable for the working group is to recommend an API that measures the performance of browser navigations. With third Internet Explorer 9 Platform Preview and WebTimings specification implementations available, it shouldn't take long to finalize an interoperable API and remove the vendor prefixes. We can't do this alone though - the new working group needs your feedback to ensure we've the right design," said Jason Weber.