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/ audit · 02

Performance

Server-side measurement: cURL timings (DNS, connect, SSL, TTFB), HTML weight, compression, cache headers, render-blocking subresources.

Measurement

// LCP / INP / CLS require a browser — use PageSpeed Insights for those Core Web Vitals.

// Enter a URL to measure its server timings.

Coverage

  • TTFB — Time to First Byte, 800/1800 ms thresholds
  • DNS / Connect / SSL — cURL handshake breakdown
  • compression — gzip / br detection + ratio
  • cache — Cache-Control, ETag, Last-Modified, Expires
  • render-blocking — CSS without media + sync JS in head
  • assets — CSS / JS / images / fonts / inline inventory
  • resource hints — preload / preconnect / dns-prefetch / prefetch
  • HTTP/2 · HTTP/3 — negotiated protocol version
  • Page weight — total, breakdown by type, inline CSS/JS
  • DOM — elements, max depth, thresholds
  • JS — async/defer/module/sync
  • Images — modern formats, dimensions, lazy loading
  • Third-party origins — distinct origins, request counts per host
  • Server-Timing — application-server breakdown
  • Alt-Svc · HSTS · Vary — Alt-Svc, HSTS, Vary, Link (Early Hints)
  • Hints validation — invalid preload as / crossorigin
  • CDN · SW · PWA — CDN, Service Worker, manifest, AMP, cookies
  • Recommendations — prioritized by impact