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

manifesto.smth.uk

https://manifesto.smth.uk/

100 100 100 100 ✓AXE –CWV

Ranks Overall #105 Built Awesome #90

Data from Sep 5, 2026, 8:05 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

0.6% 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 1.08 s 1.07 s ↑ +9 ms (+0.8%) 1.05 s 1.08 s
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 799 ms 785 ms ↑ +14 ms (+1.8%) 773 ms 799 ms
Speed Index 799 ms 785 ms ↑ +14 ms (+1.8%) 773 ms 799 ms
TTFB Time to First Byte 628 ms 619 ms ↑ +9 ms (+1.5%) 603 ms 628 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 117 ms
time to first byte 30 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 45.2 kB 45.2 kB ↓ -19 B 45.1 kB 45.2 kB
Requests 5 5 → no change 5 5
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

  • font 91.8% 39.3 kB · 1 req
  • document 6.2% 2.7 kB · 1 req
  • other 2% 860 B · 2 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 119 ms 97 ms ↑ +22 ms (+22.9%) 97 ms 119 ms
Long Tasks 0 0 → no change 0 0
DOM Elements 63 63 → no change 63 63
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 81 ms
style layout 20 ms
script evaluation 9 ms
parse HTML 6 ms
paint composite render 4 ms
script parse compile 1 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 120 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, 8:05 PM UTC 100 1.08 s 0 0 ms 45.2 kB 3/3 ±0 2,480 0% 21.9s
Aug 29, 2026, 7:43 PM UTC 100 1.07 s 0 0 ms 45.2 kB 3/3 ±0 3,085 +24% 20.1s
Aug 21, 2026, 3:12 AM UTC 100 1.05 s 0 0 ms 45.1 kB 3/3 ±0 2,494 +1% 21.2s

Embed this score

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