McProfileView is a utility mod for server owners and mod developers. It allows you to see a visual representation of Minecraft profile dumps in a GUI on the client.
To use the intergrated profiler in the vanilla game, run the command `/debug start`. This will start the profiler recording data. When you want to end the capture, run the command `/debug stop`. This will save a file with the name profile-results-yyyy-mm-dd_hh.mi.ss.txt in the the debug/ folder in .minecraft/ .
On the main menu, select the McProfileView button, then click the open profile button and navigate to the profiler dump you want to view.
This will present you with a bar you can click on to view the contents of that item.
The 'Step up' button allows you to return to layer you were previously on.
