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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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conf.11ty.dev

https://conf.11ty.dev/

99PERF 100A11Y 100BEST 100SEO !AXE –CWV

Ranks Overall #622 Built Awesome #468

Data from Oct 3, 2026, 1:53 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

Eleventy 3.0.0 Built with Eleventy 3.0.0
Vercel Hosted by Vercel

Lighthouse Scores LAB Simulated

99
Performance
no change
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 1.75 s good ↑ +9 ms (+0.5%) 1.74 s – 1.75 s
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0.018 good → no change 0.018 – 0.018
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 1.67 s good ↑ +9 ms (+0.5%) 978 ms – 1.67 s
Speed Index 1.67 s good ↑ +9 ms (+0.5%) 978 ms – 1.67 s
TTFB Time to First Byte 613 ms good ↑ +5 ms (+0.8%) 608 ms – 618 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 40 ms
resource load duration 24 ms
resource load delay 19 ms
time to first byte 9 ms

Page weight

Metric Value Change / range Trend
Page Weight 101 kB ↑ +83 B (+0.1%) 101 kB – 101 kB
Requests 17 → no change 17 – 17
Third-party Weight 12.2 kB → no change 12.2 kB – 12.2 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
image 60.5% 60.9 kB 11
document 21.2% 21.4 kB 1
font 12.1% 12.2 kB 1
script 4.5% 4.5 kB 1
other 1.7% 1.7 kB 1
Total 101 kB 17

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Google Fonts font 12.2 kB 0 ms
Total 12.2 kB 0 ms

Without JavaScript

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

Scripts disabled
As rendered

Page health

Metric Value Change / range Trend
Main Thread Work 345 ms ↑ +37 ms (+12%) 308 ms – 419 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 387 → no change 387 – 392
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 2 → no change 2 – 2
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% 144 ms
style layout 26% 91 ms
script evaluation 16% 56 ms
paint composite render 10% 34 ms
parse HTML 5% 18 ms
script parse compile 1% 3 ms
Total 345 ms

Axe violations axe-core 4.13.0, full rule set

2 violating nodes across 1 rule, 749 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 2 nodes
    Offending elements
    1. footer-background 
      <footer-background class="wxyr4q3_4">
    2. canvas 
      <canvas width="412" height="823" style="position: fixed; top: 0px; left: 0px; pointer-events: none; z-index: 100;"></canvas>

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, 1:53 AM UTC 99 1.75 s 0.018 0 ms 101 kB 3/3 ±0 2,389 -4% 22.9s Wayback
Sep 25, 2026, 11:55 PM UTC 99 1.74 s 0.018 0 ms 101 kB 3/3 ±1 2,998 +21% 21.9s Wayback
Sep 18, 2026, 8:32 PM UTC 99 1.74 s 0.018 0 ms 101 kB 3/3 ±1 2,477 0% 22.8s Wayback
Sep 11, 2026, 5:41 PM UTC 100 1.75 s 0.018 0 ms 101 kB 3/3 ±0 2,451 -1% 24.3s Wayback
Sep 4, 2026, 2:55 PM UTC 99 1.74 s 0.018 0 ms 101 kB 3/3 ±1 2,283 -8% 22.9s Wayback
Aug 28, 2026, 1:53 PM UTC 99 1.75 s 0.018 0 ms 101 kB 3/3 ±1 2,480 0% 23.4s Wayback
Aug 20, 2026, 7:35 PM UTC 99 1.75 s 0.018 0 ms 101 kB 3/3 ±0 2,368 -5% 23.6s Wayback

Embed this score

Use this web component to show conf.11ty.dev'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://conf.11ty.dev/"></speedlify2-score>