Extension:NavigationTiming

The NavigationTiming extension allows logging perceived latency measurements, exposed by browsers as part of the proposed Navigation Timing API.

What data is logged?
See the NavigationTiming JSON EventLogging schema.

How is the information used?
Since (as of 2013-03-13) the extension is still pending initial deployment, no data exists yet. Engineers at the Wikimedia Foundation intend to use this data to assess the impact (positive and negative) of changes to code or server configuration, and thus to help guide ongoing work on site performance.

Additional resources

 * Navigation Timing: draft specification from the W3C
 * performance.timing object: simplified descriptions of the measurements available.
 * Measuring Page Load Speed with Navigation Timing