Have you ever asked yourself these questions?
- Where does my computing time go?
- What is slowing down my MediaWiki Extension?
- Is it the Code or the content?
Use this MediaWiki Extension to find out. It will show you detailed diagrams of which functions, classes, methods or content fractions (wikiScript!) are eating your performance.
Video: SMWCon Fall 2014 in Vienna, Achim Bode, Introducing Performance Monitor
Screenshot Performance Monitor 
For detailed diagrams that show the differences between different (e.g. cached and non-cached) scenarios, see the Diagram examples below.
See 
Result diagram 0:
Typical error detected, here a massive repetitive call problem
Result diagram 1: empty page for comparison
Result diagram 2: drilldown into Article:view
Result diagram 3: empty test page with sidebar cache
Result diagram 4: empty test page with sidebar cache
Result diagram 5: job-runrate reduced to 0, without cache
Result diagram 6: job-runrate reduced to 0, with resource-loader cache
GNU General Public License 2.0
Joachim Bode @ Data Farms GmbH (Client: Volkswagen AG R&D, 2014)