This document discusses measuring performance impact on Chrome OS. It recommends using chrome://tracing and Tast to analyze performance. Performance analysis involves observing differences, collecting data, analyzing it, implementing changes, and checking for improvements. Manual analysis can be expensive, error-prone, and difficult for fast releases. Integration testing refines test strategies, develops automated tests using Tast, deploys tests to Tast, and generates reports on chromeperf.appspot.com to track performance on target devices.