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

robsterlini.co.uk

https://robsterlini.co.uk/

100 100 100 100 ✓AXE –CWV

Ranks Overall #47 11ty Emeritus

Data from Sep 6, 2026, 10:20 AM UTC old Measured once a week · 3 runs since Aug 21, 2026

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

Stack

Netlify Hosted by Netlify

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

This page is client rendered.

Nothing was painted until the scripts ran. This is a web performance and robustness issue!

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

Scripts disabled
As rendered

99.9% of pixels differ — they have almost nothing in common. 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 1.21 s 1.22 s ↓ -19 ms (-1.6%) 1.20 s 1.22 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 781 ms 798 ms ↓ -17 ms (-2.1%) 781 ms 798 ms
Speed Index 781 ms 798 ms ↓ -17 ms (-2.1%) 781 ms 961 ms
TTFB Time to First Byte 605 ms 624 ms ↓ -19 ms (-3%) 603 ms 624 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 56 ms
time to first byte 6 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 96.5 kB 96.2 kB ↑ +274 B (+0.3%) 96.2 kB 96.5 kB
Requests 10 10 → no change 10 10
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 84.7% 81.7 kB · 4 req
  • document 8% 7.7 kB · 1 req
  • stylesheet 3.6% 3.5 kB · 2 req
  • script 2.8% 2.7 kB · 2 req
  • other 1% 927 B · 1 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 145 ms 152 ms ↓ -7 ms (-4.7%) 145 ms 300 ms
Long Tasks 0 0 → no change 0 0
DOM Elements 141 141 → no change 141 141
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 31 ms
script evaluation 17 ms
parse HTML 9 ms
paint composite render 6 ms
script parse compile 2 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 261 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 6, 2026, 10:20 AM UTC 100 1.21 s 0 0 ms 96.5 kB 3/3 ±0 2,220 -11% 21.8s
Aug 30, 2026, 7:55 AM UTC 100 1.22 s 0 0 ms 96.2 kB 3/3 ±0 2,888 +16% 23.3s
Aug 21, 2026, 2:46 PM UTC 100 1.20 s 0 0 ms 96.5 kB 3/3 ±0 2,505 +1% 22.9s