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

a11yproject.com

https://www.a11yproject.com/

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

Ranks Overall #221 Built Awesome #176

Data from Oct 5, 2026, 1:49 AM UTC old Measured once a week · 7 runs since Aug 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

Netlify Hosted by Netlify

Lighthouse Scores LAB Simulated

99
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 (2026-09-05 → 2026-10-02), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.12 s good ↓ -6 ms (-0.3%) 1.99 s – 2.13 s 1.33 s good 94.1% 2.8% 3.1%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — — —
CLS CWV Cumulative Layout Shift 0.012 good ↑ +0.004 (+50%) 0.008 – 0.017 0 good 94.4% 5.6% 0%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 919 ms good ↓ -6 ms (-0.6%) 908 ms – 944 ms 1.19 s good 88.7% 5.5% 5.8%
Speed Index 919 ms good ↓ -6 ms (-0.6%) 908 ms – 944 ms n/a —
TTFB Time to First Byte 619 ms good ↓ -6 ms (-1%) 608 ms – 644 ms 768 ms good 77.3% 16.5% 6.2%

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 147 ms
time to first byte 21 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.12 s
Field p75 1.33 s

The lab LCP is 1.6× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 266 kB ↓ -83 B 266 kB – 266 kB
Requests 15 → no change 15 – 15
Third-party Weight 0 B → no change 0 B – 0 B
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 11.3 kB → no change 11.3 kB – 11.4 kB

By resource type

Type Transfer Share Size Requests
image 73% 194 kB 5
font 16.4% 43.7 kB 2
stylesheet 5.3% 14.0 kB 1
document 3.3% 8.8 kB 1
other 1.1% 3.0 kB 3
script 0.8% 2.2 kB 3
Total 266 kB 15

Page health

Metric Value Change / range Trend
Main Thread Work 386 ms ↑ +75 ms (+24%) significant 312 ms – 386 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 250 → no change 250 – 250
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 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
other 42% 164 ms
style layout 35% 136 ms
paint composite render 12% 48 ms
script evaluation 5% 19 ms
parse HTML 4% 17 ms
script parse compile 1% 3 ms
Total 386 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 597 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
2026-09-26 1.33 s 104 ms 0 1.19 s 775 ms
2026-09-19 1.33 s 111 ms 0 1.19 s 814 ms
2026-09-12 1.69 s — 0.010 1.49 s 812 ms
2026-09-05 1.71 s — 0.010 1.52 s 940 ms
2026-08-29 1.57 s 98 ms 0 1.39 s 937 ms
2026-08-22 1.53 s — 0 1.29 s 813 ms
2026-08-15 1.36 s 85 ms 0 1.15 s 757 ms
2026-08-08 1.41 s 90 ms 0 1.20 s 806 ms
2026-08-01 1.36 s — 0 1.15 s 786 ms
2026-07-25 1.42 s 89 ms 0 1.15 s 796 ms
2026-07-18 1.55 s 98 ms 0 1.35 s 848 ms
2026-07-11 1.25 s — 0 1.01 s 687 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 5, 2026, 1:49 AM UTC 99 2.12 s 0.012 0 ms 266 kB 3/3 ±0 2,631 +6% 23.6s Wayback
Sep 27, 2026, 11:52 PM UTC 99 2.13 s 0.008 0 ms 266 kB 3/3 ±0 3,067 +23% 22.9s Wayback
Sep 20, 2026, 8:53 PM UTC 99 2.11 s 0.012 0 ms 266 kB 3/3 ±1 2,440 -2% 26.2s Wayback
Sep 13, 2026, 8:33 PM UTC 99 2.11 s 0.012 0 ms 266 kB 3/3 ±0 2,484 0% 22.1s Wayback
Sep 6, 2026, 7:03 PM UTC 99 2.05 s 0.017 0 ms 266 kB 3/3 ±1 2,337 -6% 23.9s Wayback
Aug 30, 2026, 6:07 PM UTC 99 1.99 s 0.017 0 ms 266 kB 3/3 ±0 2,409 -3% 23.5s Wayback
Aug 21, 2026, 9:38 AM UTC 99 2.13 s 0.012 0 ms 266 kB 3/3 ±1 2,418 -3% 23s Wayback

Embed this score

Use this web component to show a11yproject.com'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.a11yproject.com/"></speedlify2-score>