CPU Profiling: What, How, and When

March 10, 2025 · 881 words · 5 min · Performance Analysis

What: What is CPU Profiling A technique for analyzing program CPU performance. By collecting detailed data during program execution (such as function call frequency, time consumption, call stacks, etc.), it helps developers identify performance bottlenecks and optimize code efficiency. Typically used in performance analysis and root cause diagnosis scenarios. How: How Profiling Data is Collected Common tools like perf are used to collect process stack information. These tools use sampling statistics to capture stack samples executing on the CPU for performance analysis.