AI Profiled 50 Commits. I Just Described the Bug | Bernie Sumption, AG Grid
⚙️ Performance debugging is slow because you're doing the science manually – forming hypotheses, recording traces, comparing results. AI can do all of that for you. One prerequisite: Chrome DevTools MCP. Without it, Claude doesn't know what it doesn't know. What's inside: 💫 How Git bisection finds the exact commit that broke performance – automatically 💫 How to build isolated stress tests that make invisible bugs obvious 💫 Why "explain my options" beats "fix this" every time 🎙️ Bernie Sumption – Engineer at AG Grid, specialising in theming and rendering performance. "The other engineers make it work fast and well, I make it look pretty" – and apparently, make AI do the hard debugging work too. Connect with Bernie: 👉 https://github.com/BernieSumption 👉 https://linkedin.com/in/berniesumption Learn more about AG Grid: 👉 https://www.ag-grid.com/ 📝 Talk: Debugging Performance With AI | Bernie Sumption This talk was recorded at JSNation Amsterdam 2026: 🔗 https://jsnation.com/?utm_source=youtube&utm_medium=BernieSumption 📌 Follow the link to watch the full version of all the conference talks, QnA’s with speakers and hands-on workshop recordings: 🔗 https://gitnation.com/events/jsnation-2026?utm_source=youtube&utm_medium=BernieSumption 🕐 Timestamps: 00:00 - Why Performance Debugging Feels Like Guesswork 00:44 - You've Been Doing Science Manually This Whole Time 02:24 - Two Things Bernie Wants You to Actually Remember 03:06 - AI Profiled 50 Commits While He Had Lunch 04:02 - Strip the Noise: Standalone Reproduction 04:38 - 100,000 Divs to Make an Invisible Bug Obvious 🚀 The most honest conversations happen after the talk. Join the next conferences by GitNation to sync with the engineers actually shipping the future: 💫 AI Coding Summit 2026 (London & Online) https://aicodingsummit.com/?utm_source=youtube&utm_medium=BernieSumption 💫 JSNation US 2026 Nov 16 & 19, 2026 (NewYork & Online) 🔗 https://jsnation.us/?utm_source=youtube&utm_medium=BernieSumption 💫 React Summit US 2026 Nov 17 & 20, 2026 (NewYork & Online) 🔗 https://reactsummit.us/?utm_source=youtube&utm_medium=BernieSumption and more! 🚀 Check out all the upcoming events from GitNation: 🔗 https://gitnation.com/events?utm_source=youtube&utm_medium=BernieSumption #GitNation #JSNation #JSNationConference #JavaScript #TypeScript #WebDev #WebPerformance #FrontendDevelopment #Frontend #PerformanceDebugging #ChromeDevTools #ChromeDevToolsMCP #AIDebugging #MCPTools #GitBisect #RenderingPerformance #AGGrid #ClaudeAI #AIforDevelopers #DeveloperTools #DevTools #SoftwareEngineering #Programming #CodingTips #LearnToCode #TechTalks #ConferenceTalk #OpenSource