Extension:PerformanceInspector

The PerformanceInspector extension collect performance related information from different parts of MediaWiki for a specific article and present them to the user. You can try out the extension on beta (look for Performance inspector in the Tools section). You can read what metrics the inspector and how you can use it at Help:PerformanceInspector.

Invoke the Performance inspector
You can find the link to the Performance inspector is in the Tools section when the extension is installed.