perf▌

A systematic approach to web performance optimization grounded in how browsers, protocols, and networks actually work. Apply these principles when building frontend applications, reviewing performance budgets, configuring servers, or diagnosing slow page loads.

Review Django code for validated performance issues. Research the codebase to confirm issues before reporting. Report only what you can prove.

Measures Core Web Vitals and identifies render-blocking resources, network chains, layout shifts, and caching issues. \n \n Analyzes performance traces using Chrome DevTools MCP to extract FCP, LCP, TBT, CLS, Speed Index, and TTFB with detailed breakdowns \n Identifies render-blocking CSS/JS, network dependency chains, missing preloads, and caching header gaps through network request inspection \n Detects layout shift culprits (images without dimensions, injected content, font swaps) and accessi