Discover how native OpenTelemetry instrumentation can enhance client libraries in this 19-minute conference talk by Liudmila Molkova from Microsoft. Explore the benefits of observability for library authors during the development process, focusing on stress and load testing Azure client libraries. Learn how native instrumentation helps optimize performance, detect and fix reliability issues, and bridge the gap between client library authors and observability expertise. Gain insights into real-world examples of issues detected through this approach, including unnecessary HTTP requests, unretried transient issues, memory over-allocation, and thread pool misconfiguration. Understand how stress testing can help identify valuable observability signals for both end users and library developers.