12daysofweb.dev
Ranks Overall #570 Built Awesome #432
Data from Oct 2, 2026, 12:34 AM UTC old Measured once a week · 7 runs since Aug 20, 2026
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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
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 | 1.08 s good | ↓ -475 ms (-30.5%) significant 1.08 s – 1.61 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 | 1 ms good | ↑ +1 ms 0 ms – 5 ms | |
| FCP First Contentful Paint | 830 ms good | ↑ +24 ms (+3%) 802 ms – 830 ms | |
| Speed Index | 830 ms good | ↑ +24 ms (+3%) 802 ms – 830 ms | |
| TTFB Time to First Byte | 631 ms good | ↑ +26 ms (+4.3%) 604 ms – 631 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 | 54.5 kB | ↑ +426 B (+0.8%) 54.0 kB – 54.5 kB | |
| Requests | 13 | → no change 13 – 13 | |
| Third-party Weight | 2.7 kB | ↑ +1 B 2.7 kB – 2.7 kB | |
| Third-party CPU | 3 ms | ↓ -1 ms (-18.2%) 2 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 |
|---|---|---|---|---|
| font | 37.9% | 20.7 kB | 1 | |
| other | 34% | 18.5 kB | 2 | |
| script | 12.5% | 6.8 kB | 7 | |
| stylesheet | 11.5% | 6.3 kB | 1 | |
| document | 4% | 2.2 kB | 1 | |
| Total | 54.5 kB | 13 |
Third parties 1 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| Plausible | 2.7 kB | 3 ms | |
| Total | 2.7 kB | 3 ms |
Without JavaScript
The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.
4.8% of pixels differ — they are nearly identical. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.
Page health
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Main Thread Work | 324 ms | ↓ -9 ms (-2.6%) 314 ms – 356 ms | |
| Long Tasks | 1 | ↑ +1 0 – 1 | |
| DOM Elements | 158 | → no change 158 – 158 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 1 | → no change 1 – 1 | |
| 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% | 136 ms | |
| style layout | 25% | 81 ms | |
| script evaluation | 21% | 68 ms | |
| paint composite render | 7% | 23 ms | |
| parse HTML | 3% | 11 ms | |
| script parse compile | 2% | 6 ms | |
| Total | 324 ms |
Axe violations axe-core 4.13.0, full rule set
1 violating node across 1 rule, 231 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
-
moderate
landmark-unique— Landmarks should have a unique role or role/label/title (i.e. accessible name) combination 1 nodeOffending element
-
.actions<aside class="actions">
-
Hygiene
Measurement log
Field history 25 weeks
Weekly p75 from the CrUX History API, backfilled in a single request.
| Week ending | LCP | INP | CLS | FCP | TTFB |
|---|---|---|---|---|---|
| 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 | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2, 2026, 12:34 AM UTC | 100 | 1.08 s | 0 | 1 ms | 54.5 kB | 3/3 | ±2 | 2,424 -2% | 24.7s |
|
|
| Sep 25, 2026, 12:29 AM UTC | 100 | 1.56 s | 0 | 0 ms | 54.1 kB | 3/3 | ±3 | 2,502 +1% | 23.7s |
|
|
| Sep 17, 2026, 11:24 PM UTC | 100 | 1.60 s | 0 | 0 ms | 54.4 kB | 3/3 | ±0 | 2,475 0% | 22.7s |
|
|
| Sep 10, 2026, 9:27 PM UTC | 100 | 1.56 s | 0 | 4 ms | 54.1 kB | 3/3 | ±1 | 2,452 -1% | 21.6s |
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| Sep 3, 2026, 7:18 PM UTC | 100 | 1.61 s | 0 | 0 ms | 54.3 kB | 3/3 | ±5 | 2,491 0% | 24.6s |
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| Aug 27, 2026, 4:08 PM UTC | 100 | 1.55 s | 0 | 0 ms | 54.0 kB | 3/3 | ±3 | 2,488 0% | 23.2s |
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| Aug 20, 2026, 3:36 PM UTC | 100 | 1.58 s | 0 | 5 ms | 54.3 kB | 3/3 | ±3 | 2,294 -8% | 22.8s |
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Embed this score
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<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://12daysofweb.dev/"></speedlify2-score>