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

cssdaily.dev

https://cssdaily.dev/

98PERF 96A11Y 100BEST 100SEO ✗AXE –CWV

Ranks Overall #1,170 Astro Showcase #110

Data from Oct 2, 2026, 6:48 AM UTC old Measured once a month · 1 run since Oct 2, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

This URL redirects to https://cssdaily.dev/challenge/2026-10-02/.

The site’s front door pointing at the page it serves there — a locale or CMS landing path, not a move. The origin is still the address of the site, so history stays under it rather than forking to a path that depends on where the measurement ran. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Astro Built with Astro
Uses ReactReact
GitHub Pages Hosted by GitHub Pages

Lighthouse Scores LAB Simulated

98
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 1.89 s good — 1.89 s – 1.89 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 — 0.004 – 0.004
TBT Total Blocking Time 127 ms good — 127 ms – 127 ms
FCP First Contentful Paint 1.08 s good — 1.08 s – 1.08 s
Speed Index 1.09 s good — 1.09 s – 1.09 s
TTFB Time to First Byte 606 ms good — 606 ms – 606 ms

Page weight

Metric Value Change / range Trend
Page Weight 392 kB — 392 kB – 392 kB
Requests 24 — 24 – 24
Third-party Weight 0 B — 0 B – 0 B
Third-party CPU 0 ms — 0 ms – 0 ms
Unused JS 116 kB — 116 kB – 116 kB
Unused CSS 0 B — 0 B – 0 B

By resource type

Type Transfer Share Size Requests
script 70.7% 277 kB 8
font 12.4% 48.5 kB 1
image 11.5% 45.1 kB 4
document 3.4% 13.4 kB 2
stylesheet 1.7% 6.5 kB 5
other 0.4% 1.6 kB 4
Total 392 kB 24

Page health

Metric Value Change / range Trend
Main Thread Work 960 ms — 960 ms – 960 ms
Long Tasks 2 — 2 – 2
DOM Elements 5 — 5 – 5
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 9 — 9 – 9
A11y Failures 1 — 1 – 1
A11y Failing Nodes 7 — 7 – 7

Main thread work

Task Time Share Duration Simulated
script evaluation 47% 449 ms
other 32% 312 ms
style layout 13% 129 ms
parse HTML 4% 43 ms
paint composite render 2% 18 ms
script parse compile 1% 10 ms
Total 960 ms

Axe violations axe-core 4.13.0, full rule set

9 violating nodes across 3 rules, 339 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 7 nodes
    Offending elements (5 of 7)
    1. .\[\[data-difficulty\=medium\]_\&\]\:flex > .w-full.p-4.\[\[data-layout\=columns\]_\&\]\:flex-row > .mb-4.flex-shrink-0.\[\[data-layout\=columns\]_\&\]\:flex-col > div:nth-child(2) > .gap-2.mb-2.h-8 > .text-xs.flex > .px-2.py-1.capitalize:nth-child(2) 
      <button class="px-2 py-1 capitalize text-gray-500 hover:text-white">overlay</button>
    2. .\[\[data-difficulty\=medium\]_\&\]\:flex > .w-full.p-4.\[\[data-layout\=columns\]_\&\]\:flex-row > .mb-4.flex-shrink-0.\[\[data-layout\=columns\]_\&\]\:flex-col > div:nth-child(2) > .gap-2.mb-2.h-8 > .text-xs.flex > .px-2.py-1.capitalize:nth-child(3) 
      <button class="px-2 py-1 capitalize text-gray-500 hover:text-white">diff</button>
    3. .ͼ19 > .cm-scroller > .cm-content[aria-label="CSS editor"][data-language="css"] > .cm-line:nth-child(2) > .ͼq 
      <span class="ͼq">--paper</span>
    4. .ͼ19 > .cm-scroller > .cm-content[aria-label="CSS editor"][data-language="css"] > .cm-line:nth-child(3) > .ͼq 
      <span class="ͼq">--ink</span>
    5. .ͼ19 > .cm-scroller > .cm-content[aria-label="CSS editor"][data-language="css"] > .cm-line:nth-child(4) > .ͼq 
      <span class="ͼq">--muted</span>
  • moderate page-has-heading-one — Page should contain a level-one heading 1 node
    Offending element
    1. html 
      <html lang="en" class="dark" data-layout="rows" data-difficulty="medium">
  • serious scrollable-region-focusable — Scrollable region must have keyboard access 1 node
    Offending element
    1. .ͼ19 > .cm-scroller 
      <div tabindex="-1" class="cm-scroller">

Accessibility failures 1 of 25 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 7 nodes

Best Practices failures 1 of 19 audits

  • valid-source-maps — Missing source maps for large first-party JavaScript 1 item

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
2026-05-09 → 2026-09-26 No data — 21 weeks under the CrUX reporting threshold
2026-05-02 879 ms 99 ms 0 744 ms 433 ms
2026-04-25 836 ms 98 ms 0 742 ms 425 ms
2026-04-18 831 ms 101 ms 0 737 ms 393 ms
2026-04-11 No data — 1 week under the CrUX reporting threshold

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 2, 2026, 6:48 AM UTC 98 1.89 s 0.004 127 ms 392 kB 3/3 ±11 2,512 +1% 203.5s Wayback