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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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lewicowo.pl

http://lewicowo.pl/

79PERF 73A11Y 78BEST 91SEO ✗AXE ✓CWV

Ranks Overall #1,661 Built Awesome #1,076

Data from Oct 2, 2026, 12:32 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

Self-hosted · nginx Hosted by Self-hosted

Lighthouse Scores LAB Simulated

79
Performance
↑ +5 (+6.8%)
73
Accessibility
no change
78
Best Practices
↑ +4 (+5.4%)
91
SEO
no change

Metrics LAB FIELD

Core Web Vitals: passing 2 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-08-23 → 2026-09-19), origin-level. From the backfilled CrUX history rather than this measurement, which predates the API key.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 5.79 s poor ↓ -3225 ms (-35.8%) significant 5.75 s – 9.02 s 707 ms good 96.6% 1.5% 1.9%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — — —
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0.174 0 good 99.7% 0% 0.3%
TBT Total Blocking Time 0 ms good → no change 0 ms – 0 ms n/a —
FCP First Contentful Paint 1.14 s good ↓ -675 ms (-37.1%) 1.10 s – 1.84 s — —
Speed Index 1.21 s good ↓ -1758 ms (-59.2%) 1.11 s – 3.76 s n/a —
TTFB Time to First Byte 571 ms good ↑ +25 ms (+4.6%) 546 ms – 613 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.

resource load duration 596 ms
time to first byte 123 ms
element render delay 30 ms
resource load delay 9 ms

Page weight

Metric Value Change / range Trend
Page Weight 1.90 MB ↓ -511 B 1.90 MB – 1.90 MB
Requests 23 ↓ -3 (-11.5%) 23 – 26
Third-party Weight 0 B → no change 0 B – 0 B
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 99.2% 1.89 MB 21
document 0.8% 14.6 kB 1
stylesheet 0.1% 1.4 kB 1
Total 1.90 MB 23

Page health

Metric Value Change / range Trend
Main Thread Work 426 ms ↓ -9 ms (-2.1%) 297 ms – 593 ms
Long Tasks 1 → no change 0 – 1
DOM Elements 270 → no change 270 – 270
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 82 → no change 82 – 82
A11y Failures 4 → no change 4 – 4
A11y Failing Nodes 81 → no change 81 – 81

Main thread work

Task Time Share Duration Simulated
other 76% 325 ms
style layout 11% 48 ms
paint composite render 8% 34 ms
script evaluation 2% 10 ms
parse HTML 2% 8 ms
script parse compile 0% 1 ms
Total 426 ms

Axe violations axe-core 4.13.0, full rule set

82 violating nodes across 5 rules, 640 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 35 nodes
    Offending elements (5 of 35)
    1. article:nth-child(1) > time 
      <time class="silver">2 lipca 2019 r.</time>
    2. article:nth-child(2) > time 
      <time class="silver">30 czerwca 2019 r.</time>
    3. article:nth-child(2) > h3 > span 
      <span class="silver normal">[1914]</span>
    4. article:nth-child(3) > time 
      <time class="silver">24 czerwca 2019 r.</time>
    5. article:nth-child(3) > h3 > span 
      <span class="silver normal">[1905]</span>
  • serious link-in-text-block — Links must be distinguishable without relying on color 26 nodes
    Offending elements (5 of 26)
    1. article:nth-child(1) > p > a 
      <a href="/zakonczenie-dzialalnosci-portalu-lewicowo-pl/">Czytaj dalej →</a>
    2. article:nth-child(2) > p > a 
      <a href="/maria-dabrowska-mysli-kooperatysty/">Czytaj dalej →</a>
    3. h3 > a[href="/pamieci-kazimierza-krauza/"] 
      <a href="/pamieci-kazimierza-krauza/">Pamięci Kazimierza Krauza</a>
    4. p > a[href="/pamieci-kazimierza-krauza/"] 
      <a href="/pamieci-kazimierza-krauza/">Czytaj dalej →</a>
    5. article:nth-child(4) > p > a 
      <a href="/nasz-stosunek-do-koalicji-ententy/">Czytaj dalej →</a>
  • critical image-alt — Images must have alternative text 19 nodes
    Offending elements (5 of 19)
    1. img[src$="indeks.png"] 
      <img class="db center mv4" src="/uploads/2019/06/indeks.png">
    2. article:nth-child(3) > .db.center.mv4 
      <img class="db center mv4" src="/uploads/2019/06/kazimierz_kelles-krauz.jpg">
    3. img[src$="saas.jpg"] 
      <img class="db center mv4" src="/uploads/2019/06/saas.jpg">
    4. article:nth-child(5) > .db.center.mv4 
      <img class="db center mv4" src="/uploads/2019/06/92b8d4b91d3ba84a57356da162b6e6d3_w1000_h967.png">
    5. article:nth-child(6) > .db.center.mv4 
      <img class="db center mv4" src="/uploads/2019/06/anti-catholic-cartoon-1889-granger.jpg">
  • moderate heading-order — Heading levels should only increase by one 1 node
    Offending element
    1. article:nth-child(1) > h3 
      <h3><a href="/zakonczenie-dzialalnosci-portalu-lewicowo-pl/">Zakończenie działalności portalu Lewicowo.pl</a></h3>
  • moderate region — All page content should be contained by landmarks 1 node
    Offending element
    1. div 
      <div class="cb tr mv4"><a href="#top">↑ Wróć na górę</a></div>

Accessibility failures 4 of 15 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 35 nodes
  • link-in-text-block — Links rely on color to be distinguishable. 26 nodes
  • image-alt — Image elements do not have `[alt]` attributes 19 nodes
  • heading-order — Heading elements are not in a sequentially-descending order 1 node

Best Practices failures 2 of 20 audits

  • is-on-https — Does not use HTTPS 23 items
  • redirects-http — Does not redirect HTTP traffic to HTTPS

SEO failures 1 of 8 audits

  • image-alt — Image elements do not have `[alt]` attributes 19 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache http/1.1

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-26 No data — 1 week under the CrUX reporting threshold
2026-09-19 707 ms — 0 659 ms 413 ms
2026-09-12 764 ms — 0 729 ms 450 ms
2026-09-05 750 ms — 0 729 ms 427 ms
2026-08-29 764 ms — 0 725 ms 424 ms
2026-08-22 741 ms — 0 702 ms 407 ms
2026-08-15 671 ms — 0 642 ms 377 ms
2026-08-08 671 ms — 0 638 ms 374 ms
2026-08-01 697 ms — 0 675 ms 401 ms
2026-07-25 728 ms — 0 694 ms 410 ms
2026-07-18 775 ms — 0 680 ms 402 ms
2026-07-11 850 ms — 0 767 ms 443 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 2, 2026, 12:32 AM UTC 79 5.79 s 0 0 ms 1.90 MB 3/3 ±18 2,431 -2% 32.8s Wayback
Sep 25, 2026, 12:27 AM UTC 74 9.02 s 0 0 ms 1.90 MB 3/3 ±22 2,456 -1% 27.8s Wayback
Sep 17, 2026, 11:22 PM UTC 74 7.90 s 0 0 ms 1.90 MB 3/3 ±8 2,487 0% 36.2s Wayback
Sep 10, 2026, 9:25 PM UTC 79 5.75 s 0 0 ms 1.90 MB 3/3 ±14 2,497 0% 28.3s Wayback
Sep 3, 2026, 7:15 PM UTC 75 7.89 s 0 0 ms 1.90 MB 3/3 ±9 2,473 -1% 30.5s Wayback
Aug 27, 2026, 4:06 PM UTC 67 7.32 s 0.174 0 ms 1.90 MB 3/3 ±21 2,417 -3% 28.7s Wayback
Aug 20, 2026, 3:34 PM UTC 73 5.76 s 0.150 0 ms 1.90 MB 3/3 ±12 2,367 -5% 31.8s Wayback

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