Introduction

With a profiler, we can learn more about how software runs—such as memory usage, CPU cycles, cache misses, I/O time, and more. This information is extremely helpful for locating performance bottlenecks. The ultimate goal of performance analysis is to find what slows the program down and maximize performance.

This post introduces perf on Linux. Using a simple program example, I will demonstrate how to analyze a program with perf, and you will see that using a profiling tool can make it much easier to identify the root cause. This post references Gabriel Krisman Bertaz’s Performance analysis in Linux。

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