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

zachleat.com/web

https://www.zachleat.com/web

98 100 100 100 ✓AXE ✓CWV

Ranks Overall #274 zachleat #11

Data from Sep 14, 2026, 5:49 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 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

98
Performance
no change
100
Accessibility
no change
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 (2026-08-16 → 2026-09-12), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 1.83 s good ↓ -274 ms (-13%) 1.83 s – 2.71 s 1.36 s good 89.4% 9.1% 1.5%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — — —
CLS CWV Cumulative Layout Shift 0.071 good ↑ +0.016 (+29.1%) significant 0.011 – 0.071 0 good 99.3% 0.7% 0%
TBT Total Blocking Time 21 ms good ↑ +16 ms (+320%) significant 0 ms – 21 ms n/a —
FCP First Contentful Paint 1.24 s good ↓ -113 ms (-8.3%) 1.24 s – 1.86 s 1.17 s good 90.3% 8.3% 1.4%
Speed Index 1.24 s good ↓ -113 ms (-8.3%) 1.24 s – 1.86 s n/a —
TTFB Time to First Byte 627 ms good ↑ +23 ms (+3.8%) 604 ms – 653 ms 883 ms needs work 73% 22.5% 4.5%

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 587 ms
element render delay 366 ms

LCP LAB Simulated vs LCP FIELD

Lab 1.83 s
Field p75 1.36 s

The lab LCP is 1.34× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 192 kB ↑ +13.7 kB (+7.9%) significant 178 kB – 192 kB
Requests 31 ↓ -3 (-8.8%) significant 31 – 35
Third-party Weight 38.3 kB ↓ -1.2 kB (-3.2%) 38.3 kB – 49.7 kB
Third-party CPU 2 ms → no change 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 38.8% 73.2 kB 6
document 29.5% 55.5 kB 1
image 19.8% 37.3 kB 13
script 7.8% 14.6 kB 5
other 2.2% 4.1 kB 2
stylesheet 2% 3.7 kB 1
Total 192 kB 31

Third parties 3 entities

Entity Transfer Size Main thread Simulated
11ty.dev image 33.6 kB 0 ms
zgo.at 4.3 kB 2 ms
goatcounter.com 382 B 0 ms
Total 38.3 kB 2 ms

Without JavaScript

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

Scripts disabled
As rendered

0.9% 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 965 ms ↑ +170 ms (+21.4%) significant 785 ms – 965 ms
Long Tasks 2 → no change 1 – 2
DOM Elements 4,369 ↓ -1080 (-19.8%) significant 4,369 – 5,501
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 0
A11y Failures 0 → no change 0 – 1
A11y Failing Nodes 0 → no change 0 – 1

Main thread work

Task Time Share Duration Simulated
style layout 46% 439 ms
other 27% 262 ms
paint composite render 10% 92 ms
script evaluation 9% 86 ms
parse HTML 9% 83 ms
script parse compile 0% 3 ms
Total 965 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 5055 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 14, 2026, 5:49 PM UTC 98 1.83 s 0.071 21 ms 192 kB 3/3 ±3 2,481 0% 69.3s Wayback
Sep 7, 2026, 2:57 PM UTC 98 2.10 s 0.055 5 ms 178 kB 3/3 ±13 2,480 0% 48.4s Wayback
Aug 31, 2026, 10:42 AM UTC 98 1.99 s 0.012 6 ms 191 kB 3/3 ±7 2,413 -3% 39.8s Wayback
Aug 23, 2026, 10:20 PM UTC 98 2.09 s 0.011 0 ms 191 kB 3/3 ±21 2,485 0% 46.2s Wayback
Aug 22, 2026, 9:20 PM UTC 99 1.90 s 0.011 0 ms 183 kB 3/3 ±12 2,772 +12% 45.2s Wayback
Aug 21, 2026, 8:27 PM UTC 96 2.71 s 0.011 0 ms 183 kB 3/3 ±5 2,465 -1% 42.5s Wayback

Embed this score

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