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

behindthesource.co.uk

https://www.behindthesource.co.uk/

98 100 100 100 ✓AXE –CWV

Ranks Overall #282 Built Awesome #229

Data from Sep 6, 2026, 9:09 PM UTC old Measured once a week · 3 runs since Aug 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Wayback Machine

Stack

Netlify Hosted by Netlify

Lighthouse Scores

98
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 1.92 s 2.06 s ↓ -142 ms (-6.9%) 1.90 s 2.06 s
CLS Cumulative Layout Shift 0.006 0.006 → no change 0.006 0.006
TBT Total Blocking Time 9 ms 11 ms ↓ -2 ms (-18.2%) 1 ms 11 ms
FCP First Contentful Paint 1.92 s 1.91 s ↑ +8 ms (+0.4%) 1.88 s 1.92 s
Speed Index 1.92 s 1.91 s ↑ +8 ms (+0.4%) 1.88 s 1.92 s
TTFB Time to First Byte 643 ms 489 ms ↑ +154 ms (+31.5%) 489 ms 643 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 113 ms
time to first byte 31 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 153 kB 153 kB ↑ +32 B 153 kB 153 kB
Requests 20 20 → no change 20 20
Third-party Weight 59.3 kB 59.2 kB ↑ +166 B (+0.3%) 59.2 kB 59.5 kB
Third-party CPU 28 ms 28 ms → no change 28 ms 31 ms
Unused JS 0 B 0 B → no change 0 B 0 B
Unused CSS 21.3 kB 21.3 kB → no change 21.3 kB 21.3 kB

By resource type

  • script 42.1% 61.5 kB · 4 req
  • image 31.7% 46.3 kB · 7 req
  • font 17.5% 25.6 kB · 1 req
  • other 3.5% 5.1 kB · 4 req
  • stylesheet 2.6% 3.8 kB · 1 req
  • document 2.6% 3.8 kB · 1 req

Third parties 2 entities

59.3 kB transferred, 28 ms on the main thread.

Netlify script 55.2 kB · 27 ms CPU
microanalytics.io 4.1 kB · 2 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 331 ms 343 ms ↓ -11 ms (-3.3%) 331 ms 375 ms
Long Tasks 2 1 ↑ +1 (+100%) significant 1 2
DOM Elements 115 115 → no change 115 115
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 117 ms
script evaluation 101 ms
style layout 60 ms
script parse compile 26 ms
parse HTML 15 ms
paint composite render 12 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 204 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
Sep 6, 2026, 9:09 PM UTC 98 1.92 s 0.006 9 ms 153 kB 3/3 ±5 2,471 0% 25.5s Wayback
Aug 30, 2026, 8:42 PM UTC 98 2.06 s 0.006 11 ms 153 kB 3/3 ±8 2,697 +9% 24.7s Wayback
Aug 21, 2026, 5:33 PM UTC 98 1.90 s 0.006 1 ms 153 kB 3/3 ±3 2,420 -2% 24.7s Wayback

Embed this score

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