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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swingswingsubmarine.com

https://www.swingswingsubmarine.com/

81PERF 100A11Y 100BEST 100SEO !AXE –CWV

Ranks Overall #927 Built Awesome #670

Data from Oct 6, 2026, 5:03 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

Eleventy 2.0.1 Built with Eleventy 2.0.1
Uses ReactReact
Self-hosted · Apache Hosted by Self-hosted

Lighthouse Scores LAB Simulated

81
Performance
↓ -4 (-4.7%)
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Metrics LAB

No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.

Metric Lab Simulated
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 3.67 s needs work ↑ +315 ms (+9.4%) significant 3.30 s – 3.68 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0 good ↓ -0.002 (-100%) significant 0 – 0.002
TBT Total Blocking Time 155 ms good ↑ +74 ms (+91.4%) significant 70 ms – 155 ms
FCP First Contentful Paint 3.17 s poor ↑ +22 ms (+0.7%) 879 ms – 3.18 s
Speed Index 3.51 s needs work ↑ +364 ms (+11.6%) 919 ms – 3.55 s
TTFB Time to First Byte 744 ms good ↑ +46 ms (+6.6%) 687 ms – 744 ms

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 1.01 s
resource load duration 150 ms
time to first byte 145 ms
resource load delay 9 ms

Page weight

Metric Value Change / range Trend
Page Weight 4.11 MB ↑ +79.3 kB (+2%) 3.40 MB – 4.52 MB
Requests 14 ↓ -1 (-6.7%) 13 – 16
Third-party Weight 298 kB ↑ +390 B (+0.1%) 298 kB – 298 kB
Third-party CPU 69 ms ↓ -1 ms (-1.6%) 64 ms – 74 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
media 89.3% 3.66 MB 5
script 7.3% 298 kB 1
font 1.8% 72.6 kB 3
image 1.5% 60.9 kB 1
stylesheet 0.1% 5.2 kB 2
document <0.1% 1.8 kB 1
Total 4.11 MB 14

Third parties 1 entities

Entity Transfer Size Main thread Simulated
JSDelivr CDN script 298 kB 69 ms
Total 298 kB 69 ms

Page health

Metric Value Change / range Trend
Main Thread Work 762 ms ↓ -71 ms (-8.5%) significant 762 ms – 843 ms
Long Tasks 1 → no change 1 – 1
DOM Elements 38 → no change 38 – 38
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 3 → no change 3 – 3
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
other 38% 290 ms
script evaluation 23% 175 ms
style layout 16% 122 ms
script parse compile 16% 121 ms
paint composite render 5% 37 ms
parse HTML 2% 18 ms
Total 762 ms

Axe violations axe-core 4.13.0, full rule set

3 violating nodes across 2 rules, 141 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

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 6, 2026, 5:03 AM UTC 81 3.67 s 0 155 ms 4.11 MB 3/3 ±39 2,504 +1% 32.4s Wayback
Sep 28, 2026, 11:45 PM UTC 85 3.36 s 0.002 81 ms 4.03 MB 3/3 ±4 2,398 -4% 26.5s Wayback
Sep 21, 2026, 7:54 PM UTC 92 3.31 s 0.002 80 ms 4.06 MB 3/3 ±14 2,359 -5% 26.5s Wayback
Sep 14, 2026, 5:48 PM UTC 85 3.36 s 0.001 70 ms 3.40 MB 3/3 ±25 2,681 +8% 28.6s Wayback
Sep 7, 2026, 2:56 PM UTC 92 3.30 s 0.002 79 ms 4.30 MB 3/3 ±18 2,331 -6% 27.4s Wayback
Aug 31, 2026, 10:36 AM UTC 81 3.68 s 0.002 155 ms 4.52 MB 3/3 ±23 2,499 +1% 30.7s Wayback
Aug 21, 2026, 2:38 PM UTC 85 3.38 s 0.002 83 ms 4.34 MB 3/3 ±19 2,281 -8% 27.5s Wayback

Embed this score

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