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

css-auditors.com

https://css-auditors.com/

99PERF 98A11Y 100BEST 92SEO ✗AXE –CWV

Ranks Overall #1,235 Built Awesome #845

Data from Oct 6, 2026, 6:58 PM UTC old Measured once a week · 8 runs since Aug 20, 2026

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

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 3,955, 59% faster than this project's median of 2,486. CPU-bound metrics — TBT, TTI, main thread work — are affected by this and may have moved without the site changing at all.

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

Stack

Cloudflare Hosted by Cloudflare

Lighthouse Scores LAB Simulated

99
Performance
no change
98
Accessibility
no change
100
Best Practices
no change
92
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 1.91 s good ↓ -81 ms (-4.1%) 1.77 s – 2.00 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 1.70 s good ↑ +728 ms (+74.7%) 915 ms – 1.70 s
Speed Index 1.70 s good ↑ +728 ms (+74.7%) 962 ms – 1.70 s
TTFB Time to First Byte 636 ms good ↑ +8 ms (+1.3%) 557 ms – 771 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.

time to first byte 345 ms
element render delay 21 ms
resource load duration 9 ms
resource load delay 8 ms

Page weight

Metric Value Change / range Trend
Page Weight 35.2 kB ↓ -113 B (-0.3%) 34.5 kB – 36.1 kB
Requests 12 → no change 12 – 12
Third-party Weight 28.2 kB ↓ -42 B (-0.1%) 27.5 kB – 29.4 kB
Third-party CPU 4 ms ↓ -1 ms (-14.6%) significant 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
script 29% 10.2 kB 1
image 25.8% 9.1 kB 6
stylesheet 25.4% 8.9 kB 1
document 13.1% 4.6 kB 1
other 6.7% 2.4 kB 3
Total 35.2 kB 12

Third parties 2 entities

Entity Transfer Size Main thread Simulated
cloudfront.net imagestylesheet 18.0 kB 0 ms
Cloudflare script 10.2 kB 4 ms
Total 28.2 kB 4 ms

Page health

Metric Value Change / range Trend
Main Thread Work 203 ms ↓ -96 ms (-32.2%) significant 203 ms – 299 ms
Long Tasks 0 → no change 0 – 0
DOM Elements 112 → no change 112 – 112
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 12 → no change 12 – 12
A11y Failures 1 → no change 1 – 1
A11y Failing Nodes 1 → no change 1 – 1

Main thread work

Task Time Share Duration Simulated
other 47% 96 ms
style layout 24% 49 ms
script evaluation 19% 38 ms
paint composite render 5% 10 ms
parse HTML 4% 8 ms
script parse compile 1% 1 ms
Total 203 ms

Axe violations axe-core 4.13.0, full rule set

12 violating nodes across 3 rules, 227 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Accessibility failures 1 of 17 audits

  • landmark-one-main — Document does not have a main landmark. 1 node

SEO failures 1 of 9 audits

  • robots-txt — robots.txt is not valid 190 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-06-06 → 2026-09-26 No data — 17 weeks under the CrUX reporting threshold
2026-05-30 4.92 s — 0.480 4.17 s 1.95 s
2026-05-23 4.92 s — 0.480 4.16 s 1.94 s
2026-05-16 4.93 s — 0.480 4.16 s 1.96 s
2026-05-09 4.93 s — 0.470 4.16 s 1.95 s
2026-04-11 → 2026-05-02 No data — 4 weeks under the CrUX reporting threshold

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 6, 2026, 6:58 PM UTC 99 1.91 s 0 0 ms 35.2 kB 3/3 ±0 3,955 +59% 28.7s Wayback
Oct 3, 2026, 1:05 PM UTC ERRORED_DOCUMENT_REQUEST: Lighthouse was unable to reliably load the page you requested. Make sure you are testing the correct URL and that the server is properly responding to all requests. (Status code: 522) 131s
Sep 26, 2026, 9:11 AM UTC 99 2.00 s 0 0 ms 35.3 kB 3/3 ±1 2,488 0% 25.2s Wayback
Sep 19, 2026, 8:35 AM UTC 99 1.77 s 0 0 ms 35.2 kB 3/3 ±1 2,482 0% 23.7s Wayback
Sep 12, 2026, 1:07 AM UTC 99 1.91 s 0 0 ms 34.9 kB 3/3 ±1 2,438 -2% 23.1s Wayback
Sep 4, 2026, 11:46 PM UTC 99 1.83 s 0 0 ms 35.0 kB 3/3 ±1 2,691 +8% 24.5s Wayback
Aug 28, 2026, 11:25 PM UTC 100 1.81 s 0 0 ms 34.5 kB 3/3 ±1 2,999 +21% 22.5s Wayback
Aug 20, 2026, 8:35 PM UTC 99 1.90 s 0 0 ms 36.1 kB 3/3 ±1 2,518 +1% 23.8s Wayback

Embed this score

Use this web component to show css-auditors.com'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://css-auditors.com/"></speedlify2-score>