speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time.

Charts Measurement runs Embed a score

conf.11ty.dev

https://conf.11ty.dev/

99 100 100 100 !AXE –CWV

Ranks Overall #569 Built Awesome #460

Data from Sep 4, 2026, 2:55 PM UTC old Measured once a week · 3 runs since Aug 20, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Wayback Machine

Stack

Eleventy 3.0.0 Built with Eleventy 3.0.0
Vercel Hosted by Vercel

Lighthouse Scores

99
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Metrics Lighthouse, mobile

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 Lighthouse
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 1.74 s good ↓ -10 ms (-0.6%) 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 1.66 s good ↓ -10 ms (-0.6%) 1.66 s – 1.67 s
Speed Index 1.66 s good ↓ -10 ms (-0.6%) 1.66 s – 1.67 s
TTFB Time to First Byte 608 ms good ↓ -9 ms (-1.5%) 608 ms – 618 ms

LCP Subparts lab observed, unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is throttled.

element render delay 58 ms
resource load delay 22 ms
resource load duration 9 ms
time to first byte 5 ms

Page weight

Metric Value Change / range Trend
Page Weight 101 kB ↑ +41 B 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

  • image 60.5% 60.9 kB · 11 req
  • document 21.2% 21.3 kB · 1 req
  • font 12.1% 12.2 kB · 1 req
  • script 4.6% 4.6 kB · 1 req
  • other 1.7% 1.7 kB · 1 req

Third parties 1 entities

12.2 kB transferred, 0 ms on the main thread.

Google Fonts font 12.2 kB · 0 ms CPU

Page health

Metric Value Change / range Trend
Main Thread Work 360 ms ↓ -20 ms (-5.1%) 333 ms – 379 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 387 ↓ -5 (-1.3%) 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

other 150 ms
style layout 97 ms
script evaluation 65 ms
paint composite render 34 ms
parse HTML 12 ms
script parse compile 3 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

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
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>