In this episode, I talk with Leandro Melendez about how performance testing changed in the last20 years. Live at HUSTEF, we swap stories from bare metal and heavy browser scripts to APIs, cloud, and Kubernetes. Leandro draws a clear line between performance and load testing. Do not run Black Friday tests every sprint. Watch production, use canaries, and learn from real users. He pushes observability first. Build dashboards, instrument early, and think about cost.