Sauce Performance is a feature that helps development and QA organizations capture and address performance regressions earlier in the cycle. It allows developers to test the front-end performance of applications in the Sauce platform at no additional cost, starting with machine learning-derived baselines with Google Lighthouse. By following best practices such as separating performance and functional tests, running tests on a single operating system, choosing relevant metrics, optimizing scripts for performance, focusing on core app experiences, and integrating it into your pipeline, users can get the most out of Sauce Performance. With its integration across all Sauce accounts, including free trials, developers can now test their applications' front-end performance at no extra cost.