Years ago, when starting the Builder project, I added a real-time CPU graph so that it was easy to detect slow-downs quickly while hacking on the product. If I ever saw a main-loop stall, it would be immediately obvious.
Over the years I added more advanced features like a Sysprof-based profiler. That duplicated the feature and requires significantly less overhead. You also have the added benefit of zooming and panning.
So in a decision that was long overdue, I’m removing the real-time graph from Builder 3.32. I never did a great job of porting that code to optimal Wayland use anyway. It was really designed with Xrender/Xshm in mind where XCopyArea() was cheap and done on the GPU.
There are better solutions now anyway.