Using Big O notation is one of the easiest ways to improve performance in modern applications and measure the complexity of your code.

The user experience is essential in modern software, and performance is vital to a good experience. Modern software is all about performance, and it can make or break your ability to engage and retain users. Applications designed with performance in mind have a greater chance of success against those that were not.

A common misconception is that a simple piece of code cannot do any harm. On the contrary, you should always presume that the consequences of adding a piece of code can be worse than you imagine. The flip side is that it only takes a few lines of code to significantly improve your app’s performance.

In this guide, we’ll explore one of the easiest ways to improve performance in modern applications: using Big O notation to measure the complexity of your code.

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