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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sebduggan.uk

https://sebduggan.uk/

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

Ranks Overall #623 Built Awesome #469

Data from Oct 4, 2026, 7:21 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 4.0.0 Built with Eleventy 4.0.0
Uses Font AwesomeFont Awesome
Cloudflare Hosted by Cloudflare

Lighthouse Scores LAB Simulated

99
Performance
no change
100
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 1.69 s good ↓ -26 ms (-1.5%) 1.56 s – 2.18 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0 good → no change 0 – 0
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 1.54 s good ↓ -15 ms (-1%) 1.54 s – 1.59 s
Speed Index 1.54 s good ↓ -15 ms (-1%) 1.54 s – 1.59 s
TTFB Time to First Byte 470 ms good ↓ -13 ms (-2.7%) 467 ms – 662 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 55 ms
time to first byte 30 ms

Page weight

Metric Value Change / range Trend
Page Weight 72.5 kB ↑ +44 B (+0.1%) 71.9 kB – 73.7 kB
Requests 10 → no change 10 – 10
Third-party Weight 10.2 kB → no change 9.6 kB – 11.4 kB
Third-party CPU 4 ms ↑ +0 ms (+7.9%) 3 ms – 5 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 68% 49.3 kB 3
script 17% 12.3 kB 2
document 10.2% 7.4 kB 1
other 4.8% 3.5 kB 4
Total 72.5 kB 10

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Cloudflare script 10.2 kB 4 ms
Total 10.2 kB 4 ms

Page health

Metric Value Change / range Trend
Main Thread Work 174 ms ↓ -72 ms (-29.2%) 152 ms – 249 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 124 → no change 124 – 124
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 2 → no change 2 – 2
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
other 47% 82 ms
script evaluation 30% 52 ms
style layout 13% 23 ms
parse HTML 6% 10 ms
paint composite render 3% 5 ms
script parse compile 1% 2 ms
Total 174 ms

Axe violations axe-core 4.13.0, full rule set

2 violating nodes across 2 rules, 230 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 4, 2026, 7:21 PM UTC 99 1.69 s 0 0 ms 72.5 kB 3/3 ±1 2,354 -5% 20.7s Wayback
Sep 27, 2026, 5:40 PM UTC 99 1.72 s 0 0 ms 72.5 kB 3/3 ±0 2,671 +7% 21.2s Wayback
Sep 20, 2026, 2:33 PM UTC 99 1.59 s 0 0 ms 72.5 kB 3/3 ±0 3,135 +26% 21.1s Wayback
Sep 13, 2026, 1:47 PM UTC 98 2.18 s 0 0 ms 72.4 kB 3/3 ±1 2,414 -3% 20.5s Wayback
Sep 6, 2026, 10:22 AM UTC 99 1.56 s 0 0 ms 72.5 kB 3/3 ±0 2,251 -9% 20.8s Wayback
Aug 30, 2026, 7:55 AM UTC 99 1.57 s 0 0 ms 71.9 kB 3/3 ±0 2,712 +9% 22.2s Wayback
Aug 21, 2026, 7:54 AM UTC 99 1.56 s 0 0 ms 73.7 kB 3/3 ±0 2,818 +13% 26.6s Wayback

Embed this score

Use this web component to show sebduggan.uk'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://sebduggan.uk/"></speedlify2-score>