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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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briefs.video

https://briefs.video/

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

Ranks Overall #543 Built Awesome #409

Data from Oct 3, 2026, 1:49 AM UTC old Measured once a week · 7 runs since Aug 20, 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
↑ +1 (+1%)
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 983 ms good ↓ -11 ms (-1.1%) 983 ms – 8.03 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.004 good ↓ -0.003 (-42.9%) 0 – 0.014
TBT Total Blocking Time 0 ms good ↓ -92 ms (-100%) significant 0 ms – 92 ms
FCP First Contentful Paint 792 ms good ↓ -61 ms (-7.2%) 792 ms – 1.07 s
Speed Index 792 ms good ↓ -61 ms (-7.2%) 792 ms – 1.49 s
TTFB Time to First Byte 608 ms good ↓ -11 ms (-1.8%) 607 ms – 840 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 45 ms
resource load duration 14 ms
time to first byte 10 ms
resource load delay 9 ms

Page weight

Metric Value Change / range Trend
Page Weight 1.80 MB ↑ +49 B 1.80 MB – 1.80 MB
Requests 33 → no change 33 – 33
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 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
image 94.7% 1.71 MB 21
font 2.6% 47.7 kB 3
media 2.1% 37.0 kB 4
document 0.4% 6.6 kB 1
stylesheet 0.1% 2.6 kB 1
other <0.1% 692 B 1
Total 1.80 MB 33

Without JavaScript

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

Scripts disabled
As rendered

1.9% 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 801 ms ↓ -547 ms (-40.6%) significant 799 ms – 1.35 s
Long Tasks 0 ↓ -3 (-100%) significant 0 – 3
DOM Elements 224 → no change 224 – 224
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 1 → no change 1 – 1
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
other 65% 522 ms
style layout 25% 203 ms
paint composite render 5% 37 ms
parse HTML 3% 22 ms
script evaluation 2% 16 ms
script parse compile 0% 1 ms
Total 801 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 451 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate region — All page content should be contained by landmarks 1 node
    Offending element
    1. .triangle 
      <img class="triangle" alt="in the corner of the web page there is a white triangle with ‘a white triangle’ written on it for no reason whatsoever" src="/assets/images/white-triangle.svg">

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 3, 2026, 1:49 AM UTC 100 983 ms 0.004 0 ms 1.80 MB 3/3 ±21 2,448 -2% 23.6s Wayback
Sep 25, 2026, 11:54 PM UTC 99 994 ms 0.007 92 ms 1.80 MB 3/3 ±26 2,492 0% 24.3s Wayback
Sep 18, 2026, 8:31 PM UTC 76 8.03 s 0.014 16 ms 1.80 MB 3/3 ±0 2,475 0% 27.1s Wayback
Sep 11, 2026, 5:36 PM UTC 99 1.81 s 0.004 0 ms 1.80 MB 3/3 ±21 2,328 -6% 24s Wayback
Sep 4, 2026, 2:53 PM UTC 100 1.00 s 0.007 0 ms 1.80 MB 3/3 ±35 2,417 -3% 26s Wayback
Aug 28, 2026, 1:53 PM UTC 76 8.03 s 0 0 ms 1.80 MB 3/3 ±22 2,308 -7% 22.9s Wayback
Aug 20, 2026, 7:32 PM UTC 100 996 ms 0.004 3 ms 1.80 MB 3/3 ±23 2,393 -4% 26.8s Wayback

Embed this score

Use this web component to show briefs.video'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://briefs.video/"></speedlify2-score>