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.

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hydrogen.design/en

https://hydrogen.design/en

99PERF 91A11Y 100BEST 100SEO ✗AXE –CWV

Ranks Overall #1,226 Built Awesome #839

Data from Oct 3, 2026, 11:39 PM UTC old Measured once a week · 7 runs since Aug 20, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

This URL redirects to https://hydrogen.design/en/.

The same URL in a different form — a trailing slash — so both are treated as one site rather than two: one history, measured once. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 4,064, 64% faster than this project's median of 2,486. CPU-bound metrics — TBT, TTI, main thread work — are affected by this and may have moved without the site changing at all.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Eleventy Built with Eleventy
Netlify Hosted by Netlify

Lighthouse Scores LAB Simulated

99
Performance
↑ +7 (+7.6%)
91
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Metrics LAB

No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.

Metric Lab Simulated
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 1.71 s good ↓ -1017 ms (-37.3%) significant 1.71 s – 3.18 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.007 good → no change 0 – 0.007
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 1.71 s good ↓ -1017 ms (-37.3%) significant 1.71 s – 3.18 s
Speed Index 1.71 s good ↓ -1017 ms (-37.3%) significant 1.71 s – 3.29 s
TTFB Time to First Byte 633 ms good ↑ +28 ms (+4.6%) 605 ms – 746 ms

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

time to first byte 103 ms
element render delay 66 ms

Page weight

Metric Value Change / range Trend
Page Weight 104 kB ↓ -128 B (-0.1%) 103 kB – 105 kB
Requests 10 → no change 10 – 10
Third-party Weight 49.5 kB → no change 49.5 kB – 50.4 kB
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
font 46.8% 48.5 kB 1
document 33.8% 35.0 kB 1
stylesheet 13.9% 14.4 kB 4
other 3.5% 3.7 kB 3
script 2% 2.1 kB 1
Total 104 kB 10

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Google Fonts font 49.5 kB 0 ms
Total 49.5 kB 0 ms

Page health

Metric Value Change / range Trend
Main Thread Work 206 ms ↓ -134 ms (-39.5%) significant 206 ms – 358 ms
Long Tasks 0 ↓ -1 (-100%) significant 0 – 1
DOM Elements 1,409 → no change 1,409 – 1,409
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 20 → no change 20 – 20
A11y Failures 2 → no change 2 – 2
A11y Failing Nodes 2 → no change 2 – 2

Main thread work

Task Time Share Duration Simulated
style layout 37% 76 ms
other 36% 74 ms
parse HTML 12% 24 ms
paint composite render 9% 18 ms
script evaluation 6% 12 ms
script parse compile 1% 2 ms
Total 206 ms

Axe violations axe-core 4.13.0, full rule set

20 violating nodes across 3 rules, 788 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate region — All page content should be contained by landmarks 18 nodes
    Offending elements (5 of 18)
    1. div:nth-child(2) > ul[data-h2-display="base(flex)"][data-h2-align-items="base(center)"][data-h2-gap="base(x1)"] > li:nth-child(1) 
      <li> <span>version <a data-h2-font-weight="base(800)" data-h2-color="base(primary.dark) base:all:focus-visible(black)" href="/en/docs/releases"> 2.1.0</a> </span> </li>
    2. h1[data-h2-margin-bottom="base(x.5)"] 
      <h1 data-h2-color="base:all(white)" data-h2-font-weight="base(700)" data-h2-margin-bottom="base(x.5)" data-h2-font-size="base(calc(var(--h2-font-size-display) * 1.25))" data-h2-overflow-wrap="base(an…
    3. p[data-h2-color="base:all(white.5)"] 
      <p data-h2-color="base:all(white.5)" data-h2-margin-bottom="base(x1)">An open-source, inline CSS framework powered by data-attributes.</p>
    4. code[data-h2-color="base:all(white)"] 
      <code data-h2-color="base:all(white)">npm install @hydrogen-css/hydrogen --save</code>
    5. div[data-h2-margin="base(-x3, 0, 0, 0)"] 
      <div data-h2-position="base(relative)" data-h2-margin="base(-x3, 0, 0, 0)">
  • serious aria-hidden-focus — ARIA hidden element must not be focusable or contain focusable elements 1 node
    Offending element
    1. .old-nav 
      <div class="old-nav" data-h2-padding="base(x.5, x.5, 0, x.5)" data-h2-position="base(absolute)" data-h2-layer="base(1)" data-h2-location="base(0, auto, auto, 0)" data-h2-height="base(x24)" data-h2-ma…
  • moderate landmark-one-main — Document should have one main landmark 1 node
    Offending element
    1. html 
      <html lang="en" data-h2="" style="scroll-behavior: smooth;">

Accessibility failures 2 of 17 audits

  • aria-hidden-focus — `[aria-hidden="true"]` elements contain focusable descendents 1 node
  • landmark-one-main — Document does not have a main landmark. 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 3, 2026, 11:39 PM UTC 99 1.71 s 0.007 0 ms 104 kB 3/3 ±12 4,064 +63% 21.2s Wayback
Sep 26, 2026, 9:57 PM UTC 92 2.73 s 0.007 0 ms 104 kB 3/3 ±37 2,499 +1% 32.4s Wayback
Sep 19, 2026, 7:17 PM UTC 91 2.76 s 0.007 0 ms 103 kB 3/3 ±1 2,499 +1% 23.8s Wayback
Sep 12, 2026, 6:14 PM UTC 92 2.74 s 0.007 0 ms 104 kB 3/3 ±6 2,337 -6% 22.9s Wayback
Sep 5, 2026, 3:58 PM UTC 92 2.73 s 0.007 0 ms 103 kB 3/3 ±3 2,385 -4% 24s Wayback
Aug 29, 2026, 12:30 PM UTC 87 3.18 s 0 0 ms 105 kB 2/3 ±12 2,253 -9% 50.4s Wayback
Aug 20, 2026, 11:33 PM UTC 87 3.16 s 0 0 ms 105 kB 2/3 ±12 2,316 -7% 50.4s Wayback

Embed this score

Use this web component to show hydrogen.design/en's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site! 

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://hydrogen.design/en"></speedlify2-score>