Carlos, i wonder how to use Instruments either.
I start my project by: Run->Run with Performance Tool->Leaks. Project runs and blue diagram grows up. One red bar at diagram beginning appears and the rest diagram is blue. Under the diagram there is a list called Licked object and values. Do not know how to handle that data? Maybe one can find a leak in the source with that?
When I start the project by: Run->Run with Performance Tool->Allocations there is a memory use diagram (I suppose) and some summary of memory usage under that. VM Tracker diagram is empty?
CPU Sampler shows device CPU load. More frames/s means more load I suppose or more optimisation needed.
Activity monitor and Time Profiler are close to System Load? I have not idea what is it used for?
Other menus are greyed bud 'Zombies' sounds interesting 😉.