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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starting-project-11y.netlify.app

https://starting-project-11y.netlify.app/

99PERF 94A11Y 100BEST 100SEO !AXE –CWV

Ranks Overall #738 Build Awesome Starters #87

Data from Oct 4, 2026, 10:46 PM UTC old Measured once a week · 7 runs since Aug 21, 2026

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

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

Stack

Eleventy 2.0.1 Built with Eleventy 2.0.1
Netlify Hosted by Netlify

Lighthouse Scores LAB Simulated

99
Performance
↓ -1 (-1%)
94
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 1.55 s good ↑ +28 ms (+1.8%) 1.53 s – 2.43 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.004 good ↑ +0.001 (+33.3%) 0.003 – 0.004
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 1.55 s good ↑ +769 ms (+98.7%) 779 ms – 2.43 s
Speed Index 1.55 s good ↑ +769 ms (+98.7%) 779 ms – 2.43 s
TTFB Time to First Byte 626 ms good ↑ +15 ms (+2.5%) 606 ms – 629 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.

element render delay 56 ms
time to first byte 27 ms

Page weight

Metric Value Change / range Trend
Page Weight 80.7 kB ↓ -246 B (-0.3%) 80.7 kB – 81.2 kB
Requests 10 → no change 10 – 10
Third-party Weight 39.5 kB → no change 39.5 kB – 39.5 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 50.8% 35.5 kB 1
other 38.1% 26.7 kB 3
script 4.6% 3.2 kB 1
stylesheet 3.6% 2.5 kB 3
document 2.9% 2.0 kB 1
Total 80.7 kB 10

Third parties 2 entities

Entity Transfer Size Main thread Simulated
Google Fonts font 36.2 kB 0 ms
Unpkg 3.2 kB 0 ms
Total 39.5 kB 0 ms

Without JavaScript

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

Scripts disabled
As rendered

12.3% of pixels differ — parts of the page change. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric Value Change / range Trend
Main Thread Work 160 ms ↓ -11 ms (-6.2%) 107 ms – 191 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 29 → no change 29 – 29
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 1 → no change 1 – 1
A11y Failures 1 → no change 1 – 1
A11y Failing Nodes 1 → no change 1 – 1

Main thread work

Task Time Share Duration Simulated
other 55% 87 ms
style layout 25% 39 ms
script evaluation 14% 23 ms
parse HTML 4% 7 ms
paint composite render 1% 2 ms
script parse compile 1% 1 ms
Total 160 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 49 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious aria-prohibited-attr — Elements must only use permitted ARIA attributes 1 node
    Offending element
    1. dark-mode-toggle label[for="t"] 
      <label for="t" part="toggleLabel" aria-label="dark" style="--dark-mode-toggle-checkbox-icon: var(--dark-mode-toggle-light-icon,url(&quot;https://googlechromelabs.github.io/dark-mode-toggle/demo/moon.…

Accessibility failures 1 of 15 audits

  • aria-prohibited-attr — Elements use prohibited ARIA attributes 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 4, 2026, 10:46 PM UTC 99 1.55 s 0.004 0 ms 80.7 kB 3/3 ±2 2,726 +10% 24.2s Wayback
Sep 27, 2026, 8:56 PM UTC 100 1.53 s 0.003 0 ms 81.0 kB 3/3 ±9 2,470 -1% 26.3s Wayback
Sep 20, 2026, 2:35 PM UTC 100 1.55 s 0.003 0 ms 81.2 kB 3/3 ±5 3,389 +36% 20.8s Wayback
Sep 13, 2026, 1:49 PM UTC 100 1.53 s 0.004 0 ms 81.1 kB 3/3 ±7 2,299 -8% 20.9s Wayback
Sep 6, 2026, 10:24 AM UTC 99 1.56 s 0.003 0 ms 81.1 kB 3/3 ±5 2,423 -3% 21.6s Wayback
Aug 30, 2026, 7:59 AM UTC 95 2.43 s 0.004 0 ms 81.2 kB 3/3 ±7 2,461 -1% 21.1s Wayback
Aug 21, 2026, 7:49 AM UTC 98 2.01 s 0.004 0 ms 80.8 kB 3/3 ±3 4,245 +71% 19.9s Wayback

Embed this score

Use this web component to show starting-project-11y.netlify.app'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://starting-project-11y.netlify.app/"></speedlify2-score>