sobolewski.cz/en/index.html
https://www.sobolewski.cz/en/index.html
Ranks Overall #482 Built Awesome #395
Data from Sep 14, 2026, 9:32 PM UTC old Measured once a week · 6 runs since Aug 21, 2026
Elsewhere:
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Wayback Machine
https://www.sobolewski.cz/en.
History from the previous URL is included below, with the move on Sep 7, 2026. A step-change around that point is likely the change of address rather than a regression.
TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse.
Numbers below are from the last successful run, old.
Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).
Stack
Lighthouse Scores LAB Simulated
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 | 4.45 s poor | ↓ -157 ms (-3.4%) 4.45 s – 4.67 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 | ↓ -5 ms (-100%) 0 ms – 22 ms | |
| FCP First Contentful Paint | 3.62 s poor | ↓ -7 ms (-0.2%) 3.62 s – 3.65 s | |
| Speed Index | 3.62 s needs work | ↓ -7 ms (-0.2%) 3.62 s – 3.65 s | |
| TTFB Time to First Byte | 620 ms good | ↑ +11 ms (+1.8%) 609 ms – 640 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.
Page weight
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Page Weight | 2.43 MB | ↓ -1.1 kB 2.43 MB – 2.43 MB | |
| Requests | 26 | ↓ -2 (-7.1%) significant 26 – 28 | |
| Third-party Weight | 341 kB | ↓ -1.2 kB (-0.4%) 341 kB – 343 kB | |
| Third-party CPU | 13 ms | ↓ -8 ms (-39.9%) significant 13 ms – 22 ms | |
| Unused JS | 0 B | → no change 0 B – 0 B | |
| Unused CSS | 13.9 kB | ↓ -18 B (-0.1%) 13.9 kB – 13.9 kB |
By resource type
| Type | Transfer | Share | Size | Requests |
|---|---|---|---|---|
| other | 61.7% | 1.50 MB | 1 | |
| image | 23.6% | 573 kB | 10 | |
| font | 10.1% | 244 kB | 4 | |
| script | 3.3% | 80.8 kB | 4 | |
| stylesheet | 1% | 24.0 kB | 4 | |
| document | 0.3% | 6.7 kB | 1 | |
| Total | 2.43 MB | 26 |
Third parties 4 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| JSDelivr CDN | 140 kB | 0 ms | |
| Google Fonts | 121 kB | 0 ms | |
| freeprivacypolicy.com | 57.4 kB | 6 ms | |
| Cloudflare CDN | 23.0 kB | 6 ms | |
| Total | 341 kB | 13 ms |
Page health
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Main Thread Work | 632 ms | ↓ -146 ms (-18.8%) significant 632 ms – 853 ms | |
| Long Tasks | 0 | ↓ -3 (-100%) significant 0 – 3 | |
| DOM Elements | 378 | → no change 378 – 378 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 0 | → no change 0 – 0 | |
| A11y Failures | 0 | → no change 0 – 0 | |
| A11y Failing Nodes | 0 | → no change 0 – 0 |
Main thread work
| Task | Time | Share | Duration Simulated |
|---|---|---|---|
| other | 42% | 267 ms | |
| style layout | 30% | 191 ms | |
| script evaluation | 14% | 86 ms | |
| parse HTML | 5% | 29 ms | |
| paint composite render | 4% | 26 ms | |
| script parse compile | 3% | 22 ms | |
| garbage collection | 2% | 11 ms | |
| Total | 632 ms |
Axe violations axe-core 4.13.0, full rule set
0 violating nodes across 0 rules, 382 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
Hygiene
Measurement log
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 21, 2026, 11:27 PM UTC | TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. |
22.5s | |||||||||
| Sep 14, 2026, 9:32 PM UTC | 76 | 4.45 s | 0 | 0 ms | 2.43 MB | 3/3 | ±9 | 2,990 +20% | 25.1s |
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| Sep 7, 2026, 7:01 PM UTC | 75 | 4.61 s | 0 | 5 ms | 2.43 MB | 3/3 | ±1 | 2,350 -5% | 24.6s |
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| Sep 7, 2026, 9:04 AM UTC old URL | 76 | 4.54 s | 0 | 6 ms | 2.43 MB | 3/3 | ±3 | 2,478 0% | 26.2s |
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| Aug 31, 2026, 3:57 AM UTC old URL | 75 | 4.67 s | 0 | 8 ms | 2.43 MB | 3/3 | ±1 | 2,341 -6% | 24.3s |
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| Aug 21, 2026, 1:55 PM UTC old URL | 75 | 4.62 s | 0 | 22 ms | 2.43 MB | 3/3 | ±8 | 2,490 0% | 29.7s |
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Embed this score
Use this web component to show sobolewski.cz/en/index.html'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://www.sobolewski.cz/en/index.html"></speedlify2-score>