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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slides.oddbird.net

https://slides.oddbird.net/

99PERF 88A11Y 100BEST 100SEO !AXE –CWV

Ranks Overall #901 Built Awesome #656

Data from Oct 4, 2026, 7:18 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).

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Lighthouse Scores LAB Simulated

99
Performance
↓ -1 (-1%)
88
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 1.96 s good ↑ +131 ms (+7.2%) 1.82 s – 1.96 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0 good → no change 0 – 0
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 905 ms good ↓ -19 ms (-2.1%) 905 ms – 1.80 s
Speed Index 905 ms good ↓ -19 ms (-2.1%) 905 ms – 1.80 s
TTFB Time to First Byte 605 ms good ↓ -19 ms (-3%) 604 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 81 ms
time to first byte 6 ms

Page weight

Metric Value Change / range Trend
Page Weight 237 kB ↑ +3 B 237 kB – 237 kB
Requests 5 → no change 5 – 5
Third-party Weight 0 B → no change 0 B – 0 B
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 90.8% 196 kB 1
stylesheet 5.6% 12.1 kB 1
script 2.5% 5.5 kB 1
document 1.1% 2.3 kB 1
Total 237 kB 5

Page health

Metric Value Change / range Trend
Main Thread Work 244 ms ↑ +21 ms (+9.4%) 153 ms – 244 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 183 → no change 183 – 183
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 3 → no change 3 – 3
A11y Failures 2 → no change 2 – 2
A11y Failing Nodes 3 → no change 3 – 3

Main thread work

Task Time Share Duration Simulated
style layout 42% 103 ms
other 37% 91 ms
script evaluation 8% 20 ms
paint composite render 5% 13 ms
parse HTML 5% 11 ms
script parse compile 2% 5 ms
Total 244 ms

Axe violations axe-core 4.13.0, full rule set

3 violating nodes across 2 rules, 375 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • critical aria-valid-attr — ARIA attributes must conform to valid names 2 nodes
    Offending elements
    1. #contact-form 
      <form action="/contact/thanks/" aria-labeledby="contact-form-label" data-form="contact" id="contact-form" method="POST" name="contact">
    2. #ccs-menu 
      <form data-ccs="menu" id="ccs-menu" aria-labeledby="css-menu-label">
  • critical label — Form elements must have labels 1 node
    Offending element
    1. input[name="subject"] 
      <input name="subject">

Accessibility failures 2 of 22 audits

  • aria-valid-attr — `[aria-*]` attributes are not valid or misspelled 2 nodes
  • label — Form elements do not have associated labels 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, 7:18 PM UTC 99 1.96 s 0 0 ms 237 kB 3/3 ±2 2,481 0% 21.6s Wayback
Sep 27, 2026, 5:36 PM UTC 100 1.82 s 0 0 ms 237 kB 3/3 ±3 2,510 +1% 22.4s Wayback
Sep 20, 2026, 2:32 PM UTC 100 1.82 s 0 0 ms 237 kB 3/3 ±3 3,417 +37% 21.3s Wayback
Sep 13, 2026, 1:46 PM UTC 99 1.96 s 0 0 ms 237 kB 3/3 ±1 2,335 -6% 21.1s Wayback
Sep 6, 2026, 10:21 AM UTC 100 1.82 s 0 0 ms 237 kB 3/3 ±3 2,457 -1% 22.2s Wayback
Aug 30, 2026, 7:56 AM UTC 98 1.95 s 0 0 ms 237 kB 3/3 ±3 2,457 -1% 21.9s Wayback
Aug 21, 2026, 7:45 AM UTC 100 1.83 s 0 0 ms 237 kB 3/3 ±0 4,442 +79% 20.6s Wayback

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Use this web component to show slides.oddbird.net'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! 

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