Open source alternatives to cloudflare/web-perf

C

cloudflare/web-perf

Audit Core Web Vitals and render-blocking resources

Measures Core Web Vitals and identifies render-blocking resources, network chains, layout shifts, and caching issues. Analyzes performance traces using Chrome DevTools MCP to extract FCP, LCP, TBT, CLS, Speed Index, and TTFB with detailed breakdowns. Identifies render-blocking CSS/JS, network dependency chains, missing preloads, and caching header gaps through network request inspection.