What is a key benefit of regularly performing unit tests?

The choice focusing on the benefit of regularly performing unit tests highlights their ability to provide immediate feedback on the most recent code changes. Unit tests are typically designed to test specific sections of code (units) in isolation, ensuring that new code integrates well with existing code. By focusing on the most recent changes, developers can quickly verify that new features or fixes do not introduce new bugs or break existing functionality. This immediate feedback loop is crucial in agile development environments where code changes happen frequently.

Regular unit testing supports efficient development practices and helps maintain code quality over time. While it is also true that automation can facilitate unit testing for larger teams, the essence of unit testing lies in its capacity to validate recent changes effectively. Performance identification, extensive documentation, and testing practices that consider the entire codebase can all be valuable but are not the core benefit highlighted here.