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

uncenter.dev

https://uncenter.dev/

99PERF 96A11Y 100BEST 100SEO ✗AXE –CWV

Ranks Overall #1,173 Built Awesome #806

Data from Oct 5, 2026, 1:41 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 3.0.1 Built with Eleventy 3.0.1
Cloudflare Hosted by Cloudflare

Lighthouse Scores LAB Simulated

99
Performance
no change
96
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 1.61 s good ↑ +12 ms (+0.7%) 1.58 s – 1.72 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 → no change 0 – 0
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms
FCP First Contentful Paint 1.53 s good ↓ -75 ms (-4.7%) 1.53 s – 1.62 s
Speed Index 1.53 s good ↓ -75 ms (-4.7%) 1.53 s – 1.62 s
TTFB Time to First Byte 616 ms good ↓ -48 ms (-7.2%) significant 466 ms – 664 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 46 ms
time to first byte 37 ms

Page weight

Metric Value Change / range Trend
Page Weight 130 kB ↑ +522 B (+0.4%) 130 kB – 132 kB
Requests 13 → no change 13 – 13
Third-party Weight 10.2 kB ↓ -127 B (-1.2%) 9.6 kB – 11.5 kB
Third-party CPU 4 ms ↑ +0 ms (+11.4%) 3 ms – 4 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
other 57.5% 74.9 kB 6
font 21.7% 28.3 kB 1
script 10.2% 13.3 kB 2
document 4.1% 5.3 kB 1
stylesheet 3.7% 4.8 kB 1
image 2.8% 3.7 kB 1
Total 130 kB 13

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Cloudflare script 10.2 kB 4 ms
Total 10.2 kB 4 ms

Page health

Metric Value Change / range Trend
Main Thread Work 199 ms ↓ -56 ms (-21.9%) significant 146 ms – 255 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 67 → no change 67 – 67
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 15 → no change 15 – 15
A11y Failures 1 → no change 1 – 1
A11y Failing Nodes 15 → no change 15 – 15

Main thread work

Task Time Share Duration Simulated
other 47% 93 ms
script evaluation 30% 61 ms
style layout 13% 25 ms
parse HTML 5% 10 ms
paint composite render 4% 7 ms
script parse compile 2% 3 ms
Total 199 ms

Axe violations axe-core 4.13.0, full rule set

15 violating nodes across 1 rule, 205 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 15 nodes
    Offending elements (5 of 15)
    1. p:nth-child(3) > a[rel="noreferrer"]:nth-child(1) 
      <a href="https://github.com/uncenter/eleventy-plugin-icons" rel="noreferrer">multiple</a>
    2. p:nth-child(3) > a[rel="noreferrer"]:nth-child(2) 
      <a href="https://github.com/uncenter/eleventy-plugin-validate" rel="noreferrer">plugins</a>
    3. a[href$="learneleventy.dev"] 
      <a href="https://learneleventy.dev" rel="noreferrer">resources</a>
    4. a[href$="11ty.dev"] 
      <a href="https://11ty.dev" rel="noreferrer">Eleventy</a>
    5. a[href$="nixos.org/"] 
      <a href="https://nixos.org/" rel="noreferrer">Nix</a>

Accessibility failures 1 of 25 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 15 nodes

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-04-11 → 2026-09-26 No data — 25 weeks under the CrUX reporting threshold

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 5, 2026, 1:41 AM UTC 99 1.61 s 0 0 ms 130 kB 3/3 ±0 2,958 +19% 20.3s Wayback
Sep 27, 2026, 11:44 PM UTC 99 1.60 s 0 0 ms 130 kB 3/3 ±1 2,966 +19% 21.2s Wayback
Sep 20, 2026, 8:42 PM UTC 99 1.62 s 0 0 ms 130 kB 3/3 ±3 4,271 +72% 20.5s Wayback
Sep 13, 2026, 8:23 PM UTC 99 1.58 s 0 0 ms 130 kB 3/3 ±1 3,206 +29% 21.3s Wayback
Sep 6, 2026, 4:46 PM UTC 99 1.68 s 0 0 ms 130 kB 3/3 ±3 2,503 +1% 21.1s Wayback
Aug 30, 2026, 1:46 PM UTC 99 1.72 s 0 0 ms 130 kB 3/3 ±0 2,464 -1% 21.4s Wayback
Aug 21, 2026, 9:47 AM UTC 99 1.70 s 0 0 ms 132 kB 3/3 ±4 2,291 -8% 22s Wayback

Embed this score

Use this web component to show uncenter.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://uncenter.dev/"></speedlify2-score>