JS Poland 2026 · Speaker
Nikola Rokvić
Software Engineer, Google | Poland
Talk
WebVitals Are Gaslighting You: A DevTools Profiling Deep Dive
Green Web Vitals can be deceptive. An app can pass every audit and still feel laggy to real users. Performance isn't just about how fast your JavaScript executes - it's about what the browser has to do next.
In this talk, we look past the green dashboards and dive deep into the reality of runtime performance. Using Chrome DevTools, we’ll dissect what actually happens during user interactions, uncovering the hidden performance killers that benchmarks ignore.
In this talk, we look past the green dashboards and dive deep into the reality of runtime performance. Using Chrome DevTools, we’ll dissect what actually happens during user interactions, uncovering the hidden performance killers that benchmarks ignore.
About Nikola Rokvić
Nikola Rokvić is a Software Engineer at Google working on web performance and latency instrumentation across Google Cloud Console. His focus is on building client-side telemetry systems that measure how users experience complex applications in the wild. He is passionate about runtime profiling, browser mechanics, and uncovering the hidden bottlenecks that synthetic audits miss.
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