Profiler is a technical term that is extremely important in rendering and optimizing game graphics (technical art). A powerful debugging tool that connects to the Unity editor or actual device and visualizes and measures graphs in real time such as CPU function execution time, GPU rendering load, VRAM/memory changes, and physical calculation overhead.
Real-world example: A detailed examination in which a doctor looks at a patient's "electrocardiogram and X-rays" to determine the exact cause of the disease
Profiler is a precise diagnostic device that instantly performs an electrocardiogram (CPU graph), X-ray (memory map), and blood test (GPU details) to visually display in milliseconds which organ (which program script) is the cause of the disease, rather than having to fumble around when a game complains that it has a headache (heavy).'' By looking at this, the truth becomes instantly clear: ``The graphics that I thought were heavy were actually extremely lightweight, and the culprit was an infinite loop in a single script that no one noticed.''
Figure: Infographic that clearly illustrates the basic processing flow and mechanism of Profiler in Japanese.
Detailed mechanism and operating principle
Open Unity's "Profiler" window, analyze the spikes in the CPU/GPU/Memory graphs while running the game, identify the functions and rendering paths that take the longest execution time, and target them for optimization.