# Is It Really Slow? Measure Your Own Code

Time real code with your language's stopwatch at growing sizes, run it several times and keep the fastest, then read the growth rate from how the times change when the data doubles.

![Cheat sheet: Is It Really Slow? Measure Your Own Code](https://fsdtrainingmedia.blob.core.windows.net/public/images/2026/11/d64a82004c3c44759be47c6b63ccd125.webp)

- Category: Data Structures
- Level: Apprentice
- Tags: Benchmark (software-development), Growth Rate, software-development, Time Complexity
- Updated: November 3, 2026

Source: https://www.ask-codey.com/cheat-sheets/big-o-measure-your-code-cheat-sheet