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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

zachleat.com/web/lighthouse-in-footer

https://www.zachleat.com/web/lighthouse-in-footer

99 100 100 100 ✓AXE ✓CWV

Ranks Overall #241 zachleat #10

Data from Sep 8, 2026, 2:54 PM UTC old Measured once a week · 6 runs since Aug 21, 2026

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

Build Awesome 4.0.0 Built with Build Awesome 4.0.0
Netlify Hosted by Netlify

Filmstrip LAB Unthrottled

How the page drew during the measured load, at 8 points across 3.00 s. Compare this filmstrip against another site.

  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

Lighthouse Scores LAB Simulated

99
Performance
no change
100
Accessibility
↑ +4 (+4.2%)
100
Best Practices
no change
100
SEO
no change

Metrics LAB FIELD

Core Web Vitals: passing 2 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-08-10 → 2026-09-06), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 1.99 s good ↑ +7 ms (+0.4%) 1.88 s – 2.33 s 1.26 s good 89.8% 8.9% 1.3%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — — —
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0.081 0 good 99.4% 0.7% 0%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 1.35 s good → no change 1.17 s – 1.85 s 1.10 s good 91.9% 6.3% 1.9%
Speed Index 1.35 s good → no change 1.17 s – 1.85 s n/a —
TTFB Time to First Byte 605 ms good → no change 604 ms – 653 ms 831 ms needs work 74.8% 19.7% 5.5%

LCP Subparts LAB Unthrottled

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

element render delay 103 ms
time to first byte 6 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.99 s
Field p75 1.26 s

The lab LCP is 1.57× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 133 kB ↓ -260 B (-0.2%) 133 kB – 141 kB
Requests 19 → no change 17 – 19
Third-party Weight 6.6 kB ↑ +1 B 5.6 kB – 15.4 kB
Third-party CPU 2 ms ↓ -0 ms (-14.3%) 2 ms – 3 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
font 43.1% 55.9 kB 4
document 36.1% 46.8 kB 1
script 11% 14.3 kB 5
image 4.3% 5.6 kB 3
other 3.2% 4.1 kB 2
stylesheet 2.4% 3.1 kB 1
Total 133 kB 19

Third parties 3 entities

Entity Transfer Size Main thread Simulated
zgo.at script 4.4 kB 2 ms
11ty.dev image 1.8 kB 0 ms
goatcounter.com 381 B 0 ms
Total 6.6 kB 2 ms

Without JavaScript

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

Scripts disabled
As rendered

0.4% 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 548 ms ↑ +8 ms (+1.4%) 446 ms – 548 ms
Long Tasks 1 ↓ -1 (-50%) 1 – 2
DOM Elements 1,231 → no change 1,120 – 1,231
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 ↓ -6 (-100%) significant 0 – 6
A11y Failures 0 ↓ -1 (-100%) 0 – 1
A11y Failing Nodes 0 ↓ -6 (-100%) significant 0 – 6

Main thread work

Task Time Share Duration Simulated
other 36% 197 ms
style layout 31% 172 ms
script evaluation 13% 69 ms
parse HTML 11% 59 ms
paint composite render 9% 49 ms
script parse compile 0% 3 ms
Total 548 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 2258 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

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-05 1.27 s — 0 1.11 s 831 ms
2026-08-29 1.19 s — 0 1.05 s 747 ms
2026-08-22 1.11 s — 0 1.04 s 693 ms
2026-08-15 1.08 s — 0 1.01 s 693 ms
2026-08-08 1.15 s — 0 1.08 s 703 ms
2026-08-01 1.09 s — 0 1.04 s 693 ms
2026-05-23 → 2026-07-25 No data — 10 weeks under the CrUX reporting threshold
2026-05-16 846 ms — 0 741 ms 557 ms
2026-04-11 → 2026-05-09 No data — 5 weeks under the CrUX reporting threshold
2026-04-04 1.19 s — 0 920 ms 616 ms
2026-03-28 1.09 s — 0 856 ms 575 ms
2026-03-21 1.19 s — 0 955 ms 693 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 8, 2026, 2:54 PM UTC 99 1.99 s 0 0 ms 133 kB 3/3 ±7 2,466 -1% 38s Wayback
Sep 7, 2026, 2:59 PM UTC 99 1.99 s 0 0 ms 133 kB 3/3 ±0 2,502 +1% 37s Wayback
Aug 31, 2026, 10:45 AM UTC 97 1.93 s 0.081 0 ms 141 kB 3/3 ±1 2,320 -7% 32.7s Wayback
Aug 23, 2026, 10:23 PM UTC 97 1.88 s 0.081 0 ms 141 kB 3/3 ±1 2,491 0% 31.8s Wayback
Aug 22, 2026, 9:23 PM UTC 98 1.91 s 0.081 0 ms 134 kB 3/3 ±1 2,774 +12% 30.7s Wayback
Aug 21, 2026, 8:30 PM UTC 97 2.33 s 0.081 0 ms 134 kB 3/3 ±1 2,494 0% 32.5s Wayback

Embed this score

Use this web component to show zachleat.com/web/lighthouse-in-footer'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.zachleat.com/web/lighthouse-in-footer"></speedlify2-score>