Have you ever engaged in performance optimization during software testing?

Yes, performance optimization during testing is often necessary to improve the efficiency of the application. For example, load testing can identify bottlenecks — slow database queries or inefficient algorithms.

In Java, optimization can include:

• Profiling the application with tools (VisualVM, JProfiler) to find "hot spots".
• Optimizing algorithms and data structures.
• Using caching of results.
• Minimizing the creation of unnecessary objects to reduce the load on the garbage collector.

Example: if tests reveal that a sorting method is too slow, it can be replaced with a more efficient algorithm or use built-in methods from the standard library.