Why does performance debugging still suck so much?

Recently I got laid off. Weirdly, I didn’t feel stressed. I actually felt… excited. For a long time I’ve wanted to build something meaningful in open source, but work always got in the way. Suddenly I had the time to try. So I asked myself a question: Why does performance debugging on Linux still suck? I remember a moment back in college that stuck with me. One semester we had to build a project using .NET on Windows . It was the first time I had to seriously use Windows for development. Honestly, I never liked .NET very much. But there was one thing I really liked : Visual Studio. When you run an application in the debugger, Visual Studio shows you live metrics: CPU usage memory usage allocations performance spikes And the coolest part was watching what happened when you interacted with the app. You could click a button in the UI and instantly see: CPU usage spike memory allocations change performance graphs jump That made performance debugging feel visual and intuitive . You could li