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

tto.koser.us

https://tto.koser.us/

100PERF 92A11Y 96BEST 100SEO !AXE –CWV

Ranks Overall #823 Built Awesome #608

Data from Oct 5, 2026, 1:39 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

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Lighthouse Scores LAB Simulated

100
Performance
no change
92
Accessibility
no change
96
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 1.00 s good ↑ +17 ms (+1.7%) 828 ms – 1.00 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.007 good ↓ -0.037 (-84.1%) 0.005 – 0.044
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 851 ms good ↑ +19 ms (+2.3%) 820 ms – 851 ms
Speed Index 851 ms good ↑ +19 ms (+2.3%) 820 ms – 851 ms
TTFB Time to First Byte 626 ms good ↑ +17 ms (+2.8%) 604 ms – 630 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 113 ms
time to first byte 29 ms

Page weight

Metric Value Change / range Trend
Page Weight 365 kB ↑ +55.8 kB (+18.6%) 226 kB – 365 kB
Requests 23 → no change 23 – 23
Third-party Weight 358 kB ↑ +124.0 kB (+55%) significant 222 kB – 358 kB
Third-party CPU 0 ms → no change 0 ms – 0 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 48.2% 174 kB 2
image 25.7% 92.7 kB 2
font 22% 79.3 kB 9
stylesheet 1.7% 6.3 kB 2
other 1.5% 5.4 kB 2
document 0.7% 2.6 kB 1
script 0.2% 612 B 1
Total 365 kB 23

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Amazon Web Services mediafont 358 kB 0 ms
Total 358 kB 0 ms

Page health

Metric Value Change / range Trend
Main Thread Work 422 ms ↑ +4 ms (+1%) 308 ms – 435 ms
Long Tasks 1 → no change 0 – 1
DOM Elements 167 → no change 160 – 167
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 3 → no change 2 – 4
A11y Failures 1 → no change 1 – 2
A11y Failing Nodes 2 → no change 2 – 3

Main thread work

Task Time Share Duration Simulated
style layout 41% 174 ms
other 41% 172 ms
paint composite render 10% 44 ms
parse HTML 4% 16 ms
script evaluation 3% 14 ms
script parse compile 0% 1 ms
Total 422 ms

Axe violations axe-core 4.13.0, full rule set

3 violating nodes across 2 rules, 240 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious link-name — Links must have discernible text 2 nodes
    Offending elements
    1. .mini-poster-parent:nth-child(2) > .mini-poster-container > .mini-poster > .link 
      <a href="/episodes/206-top-fifteen-books-from-the-last-fifteen-books-we-read-from-the-book-poster/" class="link">&nbsp;</a>
    2. .mini-poster-parent:nth-child(3) > .mini-poster-container > .mini-poster > .link 
      <a href="/episodes/176-in-the-beginning-dog-a-comedic-reading-of-pd-eastmans-go-dog-go/" class="link">&nbsp;</a>
  • moderate page-has-heading-one — Page should contain a level-one heading 1 node
    Offending element
    1. html 
      <html lang="en">

Accessibility failures 1 of 13 audits

  • link-name — Links do not have a discernible name 2 nodes

Best Practices failures 1 of 17 audits

  • errors-in-console — Browser errors were logged to the console 4 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 4 console errors

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 5, 2026, 1:39 AM UTC 100 1.00 s 0.007 0 ms 365 kB 3/3 ±5 2,471 -1% 23.1s Wayback
Sep 27, 2026, 11:43 PM UTC 100 984 ms 0.044 0 ms 308 kB 3/3 ±8 2,476 0% 23.4s Wayback
Sep 20, 2026, 6:05 PM UTC 100 1.00 s 0.044 0 ms 333 kB 3/3 ±12 3,330 +34% 21.8s Wayback
Sep 13, 2026, 5:24 PM UTC 100 1.00 s 0.007 0 ms 358 kB 3/3 ±0 2,452 -1% 22.8s Wayback
Sep 6, 2026, 2:03 PM UTC 100 979 ms 0.005 0 ms 306 kB 3/3 ±11 2,479 0% 24.1s Wayback
Aug 30, 2026, 1:41 PM UTC 100 828 ms 0.043 0 ms 348 kB 3/3 ±8 3,385 +36% 22.1s Wayback
Aug 21, 2026, 9:46 AM UTC 100 979 ms 0.005 0 ms 226 kB 3/3 ±13 2,476 0% 24.5s Wayback

Embed this score

Use this web component to show tto.koser.us'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://tto.koser.us/"></speedlify2-score>