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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.

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surma.dev

https://surma.dev/

95PERF 83A11Y 100BEST 85SEO !AXE !CWV

Ranks Overall #1,114 Built Awesome #775

Data from Oct 4, 2026, 10:50 PM UTC old Measured once a week Β· 7 runs since Aug 21, 2026

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

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Lighthouse Scores LAB Simulated

95
Performance
↓ -2 (-2.1%)
83
Accessibility
no change
100
Best Practices
no change
85
SEO
no change

Metrics LAB FIELD

Core Web Vitals: failing 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), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.69 s needs work ↑ +282 ms (+11.7%) significant 2.41 s – 2.69 s 2.51 s needs work 75.9% 15.3% 8.8%
INP CWV Interaction to Next Paint β€” field only, no lab run can measure it n/a — — —
CLS CWV Cumulative Layout Shift 0.008 good β†’ no change 0 – 0.008 0 good 97% 2.2% 0.8%
TBT Total Blocking Time 0 ms good β†’ no change 0 ms – 16 ms n/a —
FCP First Contentful Paint 1.75 s good ↑ +164 ms (+10.3%) 1.57 s – 2.44 s 1.97 s needs work 69.6% 17.4% 13%
Speed Index 1.75 s good ↑ +34 ms (+2%) 1.69 s – 2.44 s n/a —
TTFB Time to First Byte 472 ms good ↓ -138 ms (-22.6%) significant 463 ms – 617 ms 1.32 s needs work 56.9% 24.8% 18.3%

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 149 ms
time to first byte 41 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.69 s
Field p75 2.51 s

The lab LCP is 1.07Γ— the field p75 β€” real users likely have similar hardware or network connectivity to the lab test.

Page weight

Metric Value Change / range Trend
Page Weight 191 kB ↑ +314 B (+0.2%) 189 kB – 191 kB
Requests 24 β†’ no change 24 – 24
Third-party Weight 10.4 kB β†’ no change 10.4 kB – 12.4 kB
Third-party CPU 4 ms ↓ -1 ms (-12.2%) 3 ms – 5 ms
Unused JS 0 B β†’ no change 0 B – 0 B
Unused CSS 0 B β†’ no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
font 76.4% 146 kB 2
image 8.7% 16.7 kB 9
script 8.2% 15.7 kB 5
stylesheet 3.7% 7.1 kB 1
document 2.5% 4.8 kB 1
other 0.3% 664 B 5
Total 191 kB 24

Third parties 2 entities

Entity Transfer Size Main thread Simulated
Cloudflare script 10.2 kB 4 ms
Google Analytics 219 B 0 ms
Total 10.4 kB 4 ms

Page health

Metric Value Change / range Trend
Main Thread Work 527 ms ↓ -116 ms (-18%) 527 ms – 792 ms
Long Tasks 1 β†’ no change 0 – 2
DOM Elements 121 β†’ no change 121 – 121
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 2 β†’ no change 2 – 2
A11y Failures 2 β†’ no change 2 – 2
A11y Failing Nodes 2 β†’ no change 2 – 2

Main thread work

Task Time Share Duration Simulated
other 56% 293 ms
style layout 24% 127 ms
script evaluation 15% 79 ms
parse HTML 3% 14 ms
paint composite render 2% 13 ms
script parse compile 0% 2 ms
Total 527 ms

Axe violations axe-core 4.13.0, full rule set

2 violating nodes across 2 rules, 214 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Accessibility failures 2 of 14 audits

  • html-has-lang β€” `<html>` element does not have a `[lang]` attribute 1 node
  • image-alt β€” Image elements do not have `[alt]` attributes 1 node

SEO failures 2 of 10 audits

  • meta-description β€” Document does not have a meta description
  • image-alt β€” Image elements do not have `[alt]` attributes 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-26 2.40 s β€” 0 1.97 s 1.36 s
2026-09-19 2.17 s β€” 0 1.93 s 1.37 s
2026-09-12 2.17 s β€” 0 1.85 s 1.28 s
2026-09-05 2.44 s β€” 0 1.99 s 1.49 s
2026-08-29 2.67 s β€” 0.010 2.08 s 1.51 s
2026-08-22 2.60 s β€” 0.010 2.09 s 1.34 s
2026-08-15 2.33 s β€” 0 1.94 s 1.24 s
2026-08-08 2.26 s β€” 0 1.94 s 1.23 s
2026-08-01 2.18 s β€” 0 1.72 s 1.22 s
2026-07-25 2.20 s β€” 0 1.75 s 1.23 s
2026-07-18 2.25 s β€” 0 1.76 s 1.25 s
2026-07-11 1.95 s β€” 0 1.70 s 1.15 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 4, 2026, 10:50 PM UTC 95 2.69 s 0.008 0 ms 191 kB 2/3 Β±1 2,869 +15% 20.6s Wayback
Sep 27, 2026, 9:00 PM UTC 97 2.41 s 0.008 0 ms 190 kB 3/3 Β±0 2,433 -2% 22s Wayback
Sep 20, 2026, 6:03 PM UTC 96 2.42 s 0.008 9 ms 190 kB 3/3 Β±1 2,488 0% 21.8s Wayback
Sep 13, 2026, 5:22 PM UTC 93 2.66 s 0.008 0 ms 191 kB 3/3 Β±3 2,478 0% 22.1s Wayback
Sep 6, 2026, 2:02 PM UTC 97 2.41 s 0.008 0 ms 191 kB 3/3 Β±2 2,494 0% 22.5s Wayback
Aug 30, 2026, 1:39 PM UTC 97 2.41 s 0.008 16 ms 190 kB 3/3 Β±1 2,471 -1% 22.6s Wayback
Aug 21, 2026, 7:45 AM UTC 96 2.42 s 0 0 ms 189 kB 3/3 Β±1 3,009 +21% 20.2s Wayback

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