Ep. 11: Solving the Mystery of Expensive, Slow Servers and WebPerf Snippets meet AI Agents
In this episode, Alfonso identifies the common server-side bottlenecks that tank TTFB and provides a production-ready checklist for triaging expensive yet slow back-ends, while Joan demonstrates how to turn manual DevTools scripts into autonomous AI "Skills" via MCP, ensuring rigorous, deterministic performance measurements without LLM hallucinations.
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Why the heck everything is so slow if my server is so expensive?
This session walks through the main server-side bottlenecks that slow down real users and search engines, with a clear focus on TTFB (time to first byte): what typically goes wrong, how to spot it, and what to fix first when time is tight. We’ll run through the tools and checklists I use in production work so you leave with a repeatable way to triage back-end and edge issues, not just another list of front-end tips. At the end, you’ll get a downloadable server-side checklist as a goody.
Alfonso Moure (He/him) is a computer engineer and co-founder and CEO of bigmomo, with a strong focus on server-side performance (SQL, caching, TTFB, infrastructure), among other areas of technical SEO and WPO. He shows how those levers connect to Core Web Vitals and business-critical speed on complex sites. He builds Python custom tooling for his projects.
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LinkedIn
WebPerf Snippets meets AI agents: orchestration without hallucination
WebPerf Snippets evolved from manual DevTools scripts into an open-source project. Now, it explores a nervous question: Can AI help with web performance?
The answer is yes, provided the LLM doesn't measure anything. By using Claude Code and Chrome DevTools MCP, the AI orchestrates deterministic JS "Skills" in a real browser. This talk covers solving parseable outputs, remote execution, and context management, defining the line between AI orchestration and deterministic measurement.
Joan Leon is a Web Performance Artisan, Google Developer Expert in Web Technologies, who helps teams and companies build faster digital experiences that improve conversion and drive real business impact. He shares what he learns at meetups, conferences, workshops, and on his blog joanleon.dev, and is currently exploring how AI and agents can automate audits and streamline web optimization workflows.
BlueSky
