Can you give an example of a situation where performance optimization is important?

Speed optimization of task execution is especially important in situations where the application processes a large number of requests or data in real-time. For example, in Node.js, this is critical for servers that serve thousands of concurrent users to minimize delays and avoid blocking.

Example: A payment processing API must respond quickly so that the user does not wait long for transaction confirmation. If the code is not optimized, it can lead to delays and a degraded user experience.