speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time.

Charts Measurement runs Embed a score

jamesbateson.co.uk

https://jamesbateson.co.uk/

100 100 100 100 ✓AXE –CWV

Ranks Overall #137 Built Awesome #119

Data from Sep 5, 2026, 5:57 PM UTC old Measured once a week · 3 runs since Aug 21, 2026

Test elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis

Stack

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Lighthouse Scores

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

  1. 375 ms
  2. 750 ms
  3. 1.13 s
  4. 1.50 s
  5. 1.88 s
  6. 2.25 s
  7. 2.63 s
  8. 3.00 s

Without JavaScript

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

Scripts disabled
As rendered

0.5% of pixels differ — they are nearly identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 804 ms 799 ms ↑ +5 ms (+0.6%) 791 ms 804 ms
CLS Cumulative Layout Shift 0 0 → no change 0 0
TBT Total Blocking Time 0 ms 0 ms → no change 0 ms 0 ms
FCP First Contentful Paint 804 ms 799 ms ↑ +5 ms (+0.6%) 791 ms 804 ms
Speed Index 804 ms 799 ms ↑ +5 ms (+0.6%) 791 ms 804 ms
TTFB Time to First Byte 620 ms 603 ms ↑ +17 ms (+2.8%) 603 ms 620 ms

LCP Subparts lab observed, unthrottled

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

element render delay 47 ms
time to first byte 22 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 14.1 kB 14.1 kB ↑ +23 B (+0.2%) 14.1 kB 14.1 kB
Requests 3 3 → no change 3 3
Third-party Weight 0 B 0 B → no change 0 B 0 B
Third-party CPU 0 ms 0 ms → no change 0 ms 0 ms
Unused JS 0 B 0 B → no change 0 B 0 B
Unused CSS 0 B 0 B → no change 0 B 0 B

By resource type

  • document 85.5% 12.1 kB · 1 req
  • other 14.5% 2.1 kB · 2 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 148 ms 132 ms ↑ +15 ms (+11.6%) 132 ms 148 ms
Long Tasks 0 0 → no change 0 0
DOM Elements 259 259 → no change 259 259
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 0 → no change 0 0
A11y Failures 0 0 → no change 0 0
A11y Failing Nodes 0 0 → no change 0 0

Main thread work

other 76 ms
style layout 39 ms
parse HTML 12 ms
paint composite render 12 ms
script evaluation 8 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 601 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
Sep 5, 2026, 5:57 PM UTC 100 804 ms 0 0 ms 14.1 kB 3/3 ±0 2,374 -4% 22.7s
Aug 29, 2026, 5:00 PM UTC 100 799 ms 0 0 ms 14.1 kB 3/3 ±0 2,963 +19% 20.9s
Aug 21, 2026, 1:16 AM UTC 100 791 ms 0 0 ms 14.1 kB 3/3 ±0 2,492 0% 21.7s

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>