midOptimisation
What is CPU profiling and how does it help optimization?
Updated May 17, 2026
Short answer
CPU profiling measures how CPU time is spent in code to identify bottlenecks.
Deep explanation
CPU profiling breaks down function execution time, call frequency, and stack traces. It helps identify hot paths where optimization yields maximum benefit. Instead of guessing, developers use profiling data to target inefficient loops, excessive recursion, or heavy computations.
Real-world example
Optimizing image processing pipelines by identifying slow transformation steps.
Common mistakes
- Optimizing non-critical code paths instead of hot paths.
Follow-up questions
- What is a flame graph?
- Difference between CPU and memory profiling?