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Add answer: How to measure execution time of a program in Linux #10647

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17 changes: 17 additions & 0 deletions topics/linux/README.md
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Expand Up @@ -598,6 +598,23 @@ tail -f <file_name>

<details>
<summary>How you measure time execution of a program?</summary><br><b>

You can measure the execution time of a program using the time command in Linux.

Example: `time ls`

Example Output:
```bash
real 0m0.005s
user 0m0.002s
sys 0m0.003s
```
- real: Total elapsed time (wall-clock time from start to finish)
- user: Time the CPU spent executing user-level instructions
- sys: Time the CPU spent in kernel (system) operations

This command is useful for analyzing the performance of commands and scripts.

</b></details>

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