Before we get into the business of how let’s first understand why. Why do we need to pay attention to the performance of our API? API performance testing is crucial for several reasons: User experience API performance directly impacts the user experience of an application or system that relies on the API. Slow or unresponsive APIs can lead to frustrated users, increased bounce rates, and loss of customers. By testing API performance, you can identify and address performance bottlenecks to ensure a smooth and responsive user experience.