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.

Charts Compare Measurement runs Embed a score Open to Work

jamesbateson.co.uk

https://jamesbateson.co.uk/

100PERF 100A11Y 100BEST 100SEO ✓AXE –CWV

Ranks Overall #157 Built Awesome #130

Data from Oct 3, 2026, 11:42 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

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 4,178, 68% 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

Netlify Hosted by Netlify

Lighthouse Scores LAB Simulated

100
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 800 ms good ↓ -13 ms (-1.6%) 791 ms – 813 ms
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 800 ms good ↓ -13 ms (-1.6%) 791 ms – 813 ms
Speed Index 800 ms good ↓ -13 ms (-1.6%) 791 ms – 813 ms
TTFB Time to First Byte 628 ms good ↑ +24 ms (+4%) 603 ms – 628 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 45 ms
time to first byte 30 ms

Page weight

Metric Value Change / range Trend
Page Weight 14.3 kB ↓ -60 B (-0.4%) 14.1 kB – 14.3 kB
Requests 3 → no change 3 – 3
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
document 85.8% 12.2 kB 1
other 14.2% 2.0 kB 2
Total 14.3 kB 3

Without JavaScript

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

Scripts disabled
As rendered

0% of pixels differ — they are identical. 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 107 ms ↓ -56 ms (-34.4%) significant 107 ms – 162 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 268 → no change 259 – 268
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 0
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
other 52% 56 ms
style layout 24% 25 ms
script evaluation 9% 9 ms
parse HTML 7% 8 ms
paint composite render 7% 8 ms
script parse compile 1% 1 ms
Total 107 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 623 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 h2

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 3, 2026, 11:42 PM UTC 100 800 ms 0 0 ms 14.3 kB 3/3 ±0 4,178 +68% 20.3s Wayback
Sep 26, 2026, 10:00 PM UTC 100 813 ms 0 0 ms 14.3 kB 3/3 ±0 2,483 0% 21.7s Wayback
Sep 19, 2026, 7:20 PM UTC 100 802 ms 0 0 ms 14.3 kB 3/3 ±0 2,472 -1% 22.6s Wayback
Sep 12, 2026, 6:16 PM UTC 100 797 ms 0 0 ms 14.3 kB 3/3 ±0 2,355 -5% 22.5s Wayback
Sep 5, 2026, 5:57 PM UTC 100 804 ms 0 0 ms 14.1 kB 3/3 ±0 2,374 -5% 22.7s Wayback
Aug 29, 2026, 5:00 PM UTC 100 799 ms 0 0 ms 14.1 kB 3/3 ±0 2,963 +19% 20.9s Wayback
Aug 21, 2026, 1:16 AM UTC 100 791 ms 0 0 ms 14.1 kB 3/3 ±0 2,492 0% 21.7s Wayback

Embed this score

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