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

leonardo.ai

https://leonardo.ai/

40PERF 93A11Y 77BEST 100SEO ✗AXE ✗CWV

Ranks Overall #1,565 Next.js Showcase #24

Data from Sep 21, 2026, 11:10 PM UTC old Measured once a week · 1 run since Sep 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Next.js Built with Next.js
Uses ReactReactPreactPreact
Vercel Hosted by Vercel

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 15.12 s. Compare this filmstrip against another site.

  1. 1.89 s
  2. 2.44 s
  3. 5.67 s
  4. 7.56 s
  5. 9.45 s
  6. 11.34 s
  7. 13.23 s
  8. 15.12 s

Lighthouse Scores LAB Simulated

40
Performance
no change
93
Accessibility
no change
77
Best Practices
no change
100
SEO
no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-08-23 → 2026-09-19), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 12.11 s poor — 12.11 s – 12.11 s 4.19 s poor 44.3% 28.6% 27.1%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 247 ms needs work 66.7% 24.6% 8.7%
CLS CWV Cumulative Layout Shift 0 good — 0 – 0 0 good 99.3% 0.4% 0.3%
TBT Total Blocking Time 1.70 s poor — 1.70 s – 1.70 s n/a —
FCP First Contentful Paint 1.68 s good — 1.68 s – 1.68 s 1.78 s good 75.6% 13.8% 10.7%
Speed Index 8.02 s poor — 8.02 s – 8.02 s n/a —
TTFB Time to First Byte 625 ms good — 625 ms – 625 ms 902 ms needs work 70.4% 20.2% 9.3%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

element render delay 1.68 s
time to first byte 755 ms

LCP LAB Simulated vs LCP FIELD

Lab 12.11 s
Field p75 4.19 s

The lab LCP is 2.89× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 2.57 MB — 2.57 MB – 2.57 MB
Requests 153 — 153 – 153
Third-party Weight 641 kB — 641 kB – 641 kB
Third-party CPU 280 ms — 280 ms – 280 ms
Unused JS 886 kB — 886 kB – 886 kB
Unused CSS 0 B — 0 B – 0 B

By resource type

Type Transfer Share Size Requests
script 66.8% 1.71 MB 46
image 13.8% 354 kB 15
font 11.9% 304 kB 6
document 3.3% 84.0 kB 1
other 2.5% 65.2 kB 24
stylesheet 1.8% 45.0 kB 10
media <0.1% 398 B 2
Total 2.57 MB 153

Third parties 6 entities

Entity Transfer Size Main thread Simulated
Google Tag Manager script 342 kB 120 ms
ContentSquare script 155 kB 88 ms
cookiefirst.com script 77.3 kB 35 ms
Heap 40.5 kB 18 ms
Impact Radius 26.1 kB 19 ms
All 6 641 kB 280 ms

Without JavaScript

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

Scripts disabled
As rendered

1.2% of pixels differ — they are nearly 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 10.13 s — 10.13 s – 10.13 s
Long Tasks 17 — 17 – 17
DOM Elements 2,288 — 2,288 – 2,288
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 7 — 7 – 7
A11y Failures 2 — 2 – 2
A11y Failing Nodes 8 — 8 – 8

Main thread work

Task Time Share Duration Simulated
script evaluation 54% 5.50 s
other 19% 1.90 s
style layout 14% 1.45 s
script parse compile 5% 512 ms
parse HTML 4% 406 ms
paint composite render 3% 308 ms
garbage collection 1% 64 ms
Total 10.13 s

Axe violations axe-core 4.13.0, full rule set

7 violating nodes across 3 rules, 1919 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious aria-hidden-focus — ARIA hidden element must not be focusable or contain focusable elements 5 nodes
  • moderate landmark-unique — Landmarks should have a unique role or role/label/title (i.e. accessible name) combination 1 node
  • moderate region — All page content should be contained by landmarks 1 node

Accessibility failures 2 of 29 audits

  • aria-hidden-focus — `[aria-hidden="true"]` elements contain focusable descendents 5 nodes
  • target-size — Touch targets do not have sufficient size or spacing. 3 nodes

Best Practices failures 3 of 20 audits

  • third-party-cookies — Uses third-party cookies 1 item
  • inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 1 item
  • valid-source-maps — Missing source maps for large first-party JavaScript 3 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-09-19 4.19 s 247 ms 0 1.78 s 902 ms
2026-09-12 4.06 s 248 ms 0 1.78 s 904 ms
2026-09-05 4.03 s 246 ms 0 1.77 s 886 ms
2026-08-29 3.96 s 245 ms 0 1.75 s 853 ms
2026-08-22 3.93 s 243 ms 0 1.74 s 821 ms
2026-08-15 3.90 s 242 ms 0 1.72 s 786 ms
2026-08-08 3.92 s 243 ms 0 1.74 s 804 ms
2026-08-01 3.99 s 245 ms 0 1.78 s 851 ms
2026-07-25 4.27 s 248 ms 0 1.86 s 902 ms
2026-07-18 4.70 s 251 ms 0 1.92 s 925 ms
2026-07-11 5.10 s 253 ms 0 1.96 s 916 ms
2026-07-04 5.52 s 255 ms 0 1.99 s 901 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 21, 2026, 11:10 PM UTC 40 12.11 s 0 1.70 s 2.57 MB 3/3 ±12 2,490 0% 140.1s Wayback