speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time.

Measurement runs Embed a score

Frameworks and Libraries

What pages are built with, measured on the pages that sell them. A framework's own site is the one page its authors control completely — and the one place the tradeoffs they chose are on display rather than described.

14 of 14 sites measured · each site once a day, most recently ago

Median scores 87 93 100 100 ✗AXE ✓CWV
Mean scores 83 94 96 97 ✗AXE ✓CWV

Across 14 sites. Core Web Vitals across 14 sites.

Recently measured
  1. react.dev
  2. vuejs.org
  3. preactjs.com
  4. htmx.org
  5. jquery.com
  6. alpinejs.dev
  7. angular.dev
  8. emberjs.com
  9. solidjs.com
  10. reactrouter.com
Perfect scores 0/14 Core Web Vitals
Passing 11
Failing 3
Unknown 0
Page weight 100k 250k 500k 1M 2.5M 5M + JavaScript Weight 0 50k 100k 250k 500k 1M + LCP 1.5s 2s 2.5s 4s 6s 10s +

Biggest movers

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

Leaderboard

Ranked by the circles first — the four Lighthouse categories and axe: all green beats any row carrying an amber, and an amber beats a red, whatever the points say. Core Web Vitals is left out of that, being unknown for most sites here. Rows level on colour are then ranked by the sum of all four Lighthouse categories, then fewest failing Core Web Vitals from real users, then fewest axe violations, then Speed Index per KB — so a fast heavy site outranks a fast empty one.

# Site Tool Host Scores Perf trend LCP CLSTBT WeightReq Lab vs field No-JS ∆
🥇#1 preactjs.com · Netlify 100 100 100 100 !AXE ✓CWV 1.70 s 0 2 ms 102 kB 18 1.3× 0.5%
🥈#2 svelte.dev SvelteKit Vercel 96 100 100 100 !AXE ✓CWV 2.59 s 0.051 25 ms 7.25 MB 71 1.9× 36.2%
🥉#3 lit.dev Listed as Build Awesome — no generator tag found on the page Google Frontend 87 100 100 100 !AXE ✓CWV 3.98 s 0 100 ms 512 kB 35 2.1× —
#4 htmx.org Zo Netlify 83 100 100 100 !AXE ✓CWV 4.21 s 0 0 ms 866 kB 55 2.6× 1.2%
#5 solidjs.com · Cloudflare 79 92 100 100 !AXE ✓CWV 4.50 s 0.009 97 ms 487 kB 27 2.5× 77.4%
#6 qwik.dev Qwik Cloudflare 97 96 58 92 !AXE ✓CWV 2.07 s 0 87 ms 2.20 MB 454 1.2× 0%
#7 alpinejs.dev · Cloudflare 92 93 100 100 ✗AXE ✓CWV 2.89 s 0.001 4 ms 219 kB 25 1.7× 0.8%
#8 react.dev Next.js Vercel 87 95 100 92 ✗AXE ✓CWV 3.91 s 0 132 ms 1.15 MB 65 1.9× 0%
#9 emberjs.com · Netlify 71 93 100 100 ✗AXE ✓CWV 6.18 s 0 324 ms 1.19 MB 35 3.4× 0%
#10 jquery.com WordPress 7.1 Cloudflare 99 86 88 92 ✗AXE ✓CWV 1.67 s 0.001 0 ms 184 kB 20 1.2× 0.1%
#11 reactrouter.com · Fly.io 77 86 100 91 ✗AXE ✓CWV 1.97 s 0 899 ms 306 kB 22 1.3× 0%
#12 angular.dev · · 60 97 100 92 ✗AXE ✗CWV 3.70 s 0.108 770 ms 1.40 MB 53 1.7× 99.9%
#13 vuejs.org VitePress 2.0.0 Netlify 87 88 100 100 ✗AXE ✗CWV 2.75 s 0.176 33 ms 308 kB 32 1.5× 34.4%
#14 tanstack.com · Cloudflare 50 84 100 92 ✗AXE ✗CWV 7.87 s 0 548 ms 3.08 MB 58 2.2× 37.1%