speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

Charts Compare Measurement runs Embed a score Open to Work

Frameworks and LibrariesWarn

Tools that developers use to build the frontends of websites.

14 of 14 sites measured · each site every 2 days, most recently ago

Page weight vs LCP
Third party vs performance
Perfect scores 0/14
Median Score ×14 86PERF 93A11Y 100BEST 100SEO ✗AXE ✓CWV
Performance ×14 Good Warn Bad Axe ×14 Good Warn Bad Core Web Vitals ×14 Passing Failing
Page weight 100k 250k 500k 1M 2.5M 5M + JavaScript Weight 0 50k 100k 250k 500k 1M + Third Party Weight 0 50k 100k 250k 500k 1M + LCP 1s 1.5s 2s 2.5s 4s 6s +

Biggest movers

Sites whose performance score improved by more than this group's normal run-to-run noise. Everything else is jitter and is deliberately hidden.

Leaderboard

Ranked by the circle color first: all green beats a row with amber, which beats red. Sites are not penalized for unknown Core Web Vitals. Tiebreakers include: sum of all four Lighthouse categories, fewest failing Core Web Vitals, then fewest axe violations, then Speed Index per KB — a heavy site outranks an empty one.

# Site Tool Uses Host Scores Perf trend LCP CLSTBT WeightReq Lab vs field No-JS ∆
🥇#1 preactjs.com Vite Preact Netlify 99PERF 100A11Y 100BEST 100SEO !AXE ✓CWV 1.59 s 0 21 ms 102 kB862 elements 17 1.2× 0%
🥈#2 svelte.dev SvelteKit Svelte Vercel 96PERF 100A11Y 100BEST 100SEO !AXE ✓CWV 2.65 s 0.051 0 ms 4.78 MB355 elements 71 2× 36.2%
🥉#3 lit.dev Listed as Build Awesome — no generator tag found on the page Lit 2.8.0 Google Frontend 85PERF 100A11Y 100BEST 100SEO !AXE ✓CWV 4.14 s 0.001 126 ms 521 kB904 elements 35 2.4× 17.4%
#4 solidjs.com Vite Solid Cloudflare 86PERF 92A11Y 100BEST 100SEO !AXE ✓CWV 3.84 s 0.009 47 ms 485 kB363 elements 27 2.2× 77.4%EMPTY
#5 htmx.org Zo htmx 2.0.11 Netlify 77PERF 100A11Y 100BEST 100SEO !AXE ✓CWV 5.12 s 0 0 ms 980 kB294 elements 64 3.3× 1.2%
#6 qwik.dev Qwik · Cloudflare 96PERF 96A11Y 58BEST 92SEO !AXE ✓CWV 1.81 s 0 169 ms 2.32 MB740 elements 448 1× 0%
#7 alpinejs.dev · PreactAlpine.js 3.17.4 Cloudflare 92PERF 93A11Y 100BEST 100SEO ✗AXE ✓CWV 2.87 s 0.001 4 ms 223 kB394 elements 26 2× 0.8%
#8 reactrouter.com React Router React Fly.io 98PERF 86A11Y 100BEST 91SEO ✗AXE ✓CWV 1.96 s 0 0 ms 311 kB104 elements 22 1.4× 0%
#9 react.dev Next.js React Vercel 79PERF 95A11Y 100BEST 92SEO ✗AXE ✓CWV 4.30 s 0 288 ms 1.15 MB1,785 elements 65 2.1× 0%
#10 emberjs.com Ember.js · Netlify 72PERF 93A11Y 96BEST 100SEO ✗AXE ✓CWV 4.22 s 0 550 ms 1.16 MB523 elements 48 1.9× 0%
#11 jquery.com WordPress 7.1 · Cloudflare 99PERF 86A11Y 88BEST 92SEO ✗AXE ✓CWV 1.71 s 0.001 0 ms 184 kB311 elements 20 1.3× 0.2%
#12 vuejs.org VitePress 2.0.0 Vue 3.5.42 Netlify 87PERF 91A11Y 100BEST 100SEO ✗AXE !CWV 2.74 s 0.175 52 ms 220 kB565 elements 25 1.5× 0%
#13 angular.dev Angular 22.2.2 · · 52PERF 97A11Y 100BEST 92SEO ✗AXE !CWV 3.95 s 0.067 1.58 s 1.41 MB431 elements 53 1.8× 87.1%
#14 tanstack.com Vite · Cloudflare 62PERF 84A11Y 100BEST 92SEO ✗AXE !CWV 5.82 s 0.034 296 ms 3.09 MB1,062 elements 70 1.6× 41.8%

Technology

Built with 10 distinct · 12 of 14 detected

  • Vite Vite 3
  • Angular Angular 1
  • Ember.js Ember.js 1
  • Next.js Next.js 1
  • Qwik Qwik 1
  • React Router React Router 1
  • SvelteKit SvelteKit 1
  • VitePress VitePress 1
  • WordPress WordPress 1
  • Zola 1

Uses 8 distinct · 9 of 14 detected

  • Preact Preact 2
  • React React 2
  • Alpine.js Alpine.js 1
  • htmx htmx 1
  • Lit Lit 1
  • Solid Solid 1
  • Svelte Svelte 1
  • Vue Vue 1

Hosted by 5 distinct · 13 of 14 detected

  • Cloudflare Cloudflare 5
  • Netlify Netlify 4
  • Vercel Vercel 2
  • Fly.io Fly.io 1
  • Google Frontend Google Frontend 1