About This Masterclass
Attending this masterclass, you will be able to architect, monitor, and troubleshoot complex web performance regressions using a combination of deep-dive manual diagnostics and AI-assisted workflows. It moves beyond high-level theory to provide a technical roadmap for engineering resilient, high-speed digital experiences in high-stakes environments. We kick off with a level-setting session to ensure everyone is aligned on the core metrics that define the modern user experience, including the foundational principles and nuances of Core Web Vitals. Moving into active diagnostics, we will examine live production performance issues found on major corporate websites to see how bottlenecks manifest in the real world. You will learn to navigate the complex landscape of monitoring by comparing Real User Monitoring (RUM), Synthetic testing, and APM. We will demonstrate how combining these tools with CI/CD regression tests builds a robust observability strategy that catches issues before they impact your bottom line. We will also focus on the evolving role and impact of Artificial Intelligence in performance engineering, including DevTools MCP to automate trace analysis, leveraging LLMs to refactor rendering-heavy JavaScript and redundant CSS. The day will also feature a hands-on "performance gauntlet" where you will apply these techniques to debug and resolve real issues in a live codebase, so bring your laptop. This masterclass is designed for web professionals who want to move beyond automated scores and master the art of modern performance engineering.