A new pane has been added[1] to the debug toolbar which visualizes[2] Profiler output.

This visualization takes all the discrete events recorded by wfProfileIn/Out, groups them by splitting titles on : and -, and draws a series of timelines of these events. This was created with the intention of helping developers to understand what the application is doing at various points in time. Using this visualization its reasonably easy to scroll down to the timeline marked 'query' and see at what point in the request each query was issued, and what other events were triggered near that time.

Erik B.

[1] https://gerrit.wikimedia.org/r/#/c/104318/ [2] http://i.imgur.com/i5tefrs.png