Konstantin Kovshenin announced a new plugin called Debug Bar Slow Actions, an extension for the Debug Bar plugin. Konstantin’s new plugin
…adds a new panel with a list of the top 100 slowest actions (and filters) during the current page request.
This should be very useful in conjunction with (as Konstantin mentions) the Query Monitor plugin to lookup which functions are hooked to the slow actions. The new plugin is also available on GitHub.
