Release status: beta
|Description||Logs perceived latency measurements from client-side|
|Author(s)||Asher Feldman, Ori Livneh, Patrick Reilly|
|Latest version||0.0.1 (2013-03-16)|
|License||GNU General Public License 2.0 or later|
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The NavigationTiming extension allows logging perceived latency measurements, exposed by browsers as part of the proposed Navigation Timing API, which «defines an interface for web applications to access timing information related to navigation and elements».
What data is logged?[edit | edit source]
- See the NavigationTiming JSON EventLogging schema.
- Browsers accounting to about 11 % of WMF's requests (as of April 2013) are not supported.
How is the information used?[edit | edit source]
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.
Sample configuration[edit | edit source]
require_once( "$IP/extensions/EventLogging/EventLogging.php" ); // required dependency require_once( "$IP/extensions/NavigationTiming/NavigationTiming.php" ); $wgNavigationTimingSamplingFactor = 10000; // log 1:10,000 requests.
Additional resources[edit | edit source]
- Navigation Timing: draft specification from the W3C
- performance.timing object: simplified descriptions of the measurements available.
- Measuring Page Load Speed with Navigation Timing
- Wikimedia Stats: Frontend Page Load Timing
|This extension is being used on one or more Wikimedia projects. This probably means that the extension is stable and works well enough to be used by such high-traffic websites. Look for this extension's name in Wikimedia's CommonSettings.php and InitialiseSettings.php configuration files to see where it's installed. A full list of the extensions installed on a particular wiki can be seen on the wiki's Special:Version page.|