Shifting performance testing left with a front-end performance testing tool can give teams faster feedback from their tests much earlier in the pipeline, allowing them to capture root causes of bottlenecks and congestion earlier, making it easier and less expensive to fix issues. Front-end performance testing is often an afterthought, but adding a tool like Sauce Performance can provide a unified quality signal for testers with a single pane of glass for test results and feedback, machine learning algorithm defined baselines to derive performance baselines, and improve developer productivity by leveraging existing Selenium test scripts.