W3C Invites Implementations of Resource Timing Level 1

The Web Performance Working Group invites implementation of the Candidate Recommendation of Resource Timing Level 1. This specification defines an interface for web applications to access the complete timing information for resources in a document. User latency is an important quality benchmark for Web Applications. While JavaScript-based mechanisms can provide comprehensive instrumentation for user latency measurements within an application, in many cases, they are unable to provide a complete end-to-end latency picture. This document introduces the PerformanceResourceTiming interface to allow JavaScript mechanisms to collect complete timing information related to resources on a document. Navigation Timing 2 extends this specification to provide additional timing information associated with a navigation.