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.

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zachleat.com/web/lighthouse-in-footer

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

99PERF 96A11Y 100BEST 100SEO ✓AXE ✓CWV

Ranks Overall #351 zachleat #11

Data from Oct 3, 2026, 11:31 PM UTC old Measured once a week · 10 runs since Aug 21, 2026

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

This URL redirects to https://www.zachleat.com/web/lighthouse-in-footer/.

The same URL in a different form — a trailing slash — so both are treated as one site rather than two: one history, measured once. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 4,426, 78% faster than this project's median of 2,486. CPU-bound metrics — TBT, TTI, main thread work — are affected by this and may have moved without the site changing at all.

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
Uses Font AwesomeFont Awesome
Netlify Hosted by Netlify

Filmstrip LAB Throttled

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
96
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Metrics LAB FIELD

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

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-04 → 2026-10-01), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 1.85 s good ↑ +11 ms (+0.6%) 1.75 s – 2.33 s 1.05 s good 96.9% 2.3% 0.8%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 87 ms good 94.8% 5.2% 0%
CLS CWV Cumulative Layout Shift 0.029 good ↑ +0.001 (+3.6%) 0 – 0.081 0 good 99.1% 0.9% 0%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 1.15 s good ↓ -65 ms (-5.3%) 999 ms – 1.85 s 1.02 s good 93.1% 5.2% 1.7%
Speed Index 1.15 s good ↓ -65 ms (-5.3%) 999 ms – 1.85 s n/a —
TTFB Time to First Byte 624 ms good ↑ +8 ms (+1.3%) 604 ms – 653 ms 642 ms good 80.7% 15.8% 3.5%

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.

time to first byte 1.15 s
element render delay 384 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.85 s
Field p75 1.05 s

The lab LCP is 1.76× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 158 kB ↑ +1.4 kB (+0.9%) 133 kB – 158 kB
Requests 22 → no change 17 – 22
Third-party Weight 6.5 kB ↓ -1 B 5.6 kB – 15.4 kB
Third-party CPU 1 ms ↓ -1 ms (-33.3%) significant 1 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 45.7% 70.7 kB 5
document 34.9% 53.9 kB 1
script 9.9% 15.3 kB 6
stylesheet 3.8% 5.9 kB 1
image 3% 4.7 kB 3
other 2.7% 4.2 kB 3
Total 158 kB 22

Third parties 3 entities

Entity Transfer Size Main thread Simulated
zgo.at script 4.3 kB 1 ms
11ty.dev image 1.8 kB 0 ms
goatcounter.com 382 B 0 ms
Total 6.5 kB 1 ms

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.

Page health

Metric Value Change / range Trend
Main Thread Work 518 ms ↓ -88 ms (-14.5%) significant 446 ms – 606 ms
Long Tasks 1 → no change 1 – 2
DOM Elements 1,664 ↑ +71 (+4.5%) 555 – 1,664
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 6
A11y Failures 1 → no change 0 – 2
A11y Failing Nodes 2 → no change 0 – 6

Main thread work

Task Time Share Duration Simulated
style layout 40% 208 ms
other 31% 159 ms
script evaluation 11% 56 ms
paint composite render 10% 52 ms
parse HTML 7% 36 ms
garbage collection 1% 5 ms
script parse compile 1% 3 ms
Total 518 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 2316 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Accessibility failures 1 of 28 audits

  • target-size — Touch targets do not have sufficient size or spacing. 2 nodes

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
2026-09-26 1.09 s 88 ms 0 1.08 s 702 ms
2026-09-19 1.20 s — 0 1.08 s 829 ms
2026-09-12 1.36 s — 0 1.17 s 883 ms
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

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 3, 2026, 11:31 PM UTC 99 1.85 s 0.029 0 ms 158 kB 3/3 ±12 4,426 +78% 57.2s Wayback
Sep 26, 2026, 9:51 PM UTC 99 1.84 s 0.028 0 ms 156 kB 3/3 ±4 2,428 -2% 67.2s Wayback
Sep 22, 2026, 6:31 PM UTC 100 1.75 s 0.026 0 ms 134 kB 3/3 ±6 2,436 -2% 45.2s Wayback
Sep 15, 2026, 4:21 PM UTC 100 1.75 s 0.001 0 ms 134 kB 3/3 ±6 2,650 +7% 44.8s Wayback
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

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