alistairshepherd.uk
Ranks Overall #575 Built Awesome #466
Data from Sep 10, 2026, 9:30 PM UTC old Measured once a week · 4 runs since Aug 20, 2026
Elsewhere:
PageSpeed Insights ·
Calibre ·
Treo ·
CrUX Vis ·
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
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 | 1.69 s good | ↑ +222 ms (+15.1%) 1.29 s – 1.83 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 | 1.54 s good | ↑ +472 ms (+44.3%) 1.07 s – 1.54 s | |
| Speed Index | 1.54 s good | ↑ +472 ms (+44.3%) 1.07 s – 1.54 s | |
| TTFB Time to First Byte | 469 ms good | ↓ -147 ms (-23.9%) 467 ms – 616 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 | 239 kB | ↓ -1006 B (-0.4%) 239 kB – 309 kB | |
| Requests | 18 | → no change 18 – 18 | |
| Third-party Weight | 381 B | → no change 380 B – 381 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 |
|---|---|---|---|---|
| other | 58.9% | 141 kB | 9 | |
| document | 14.5% | 34.6 kB | 1 | |
| font | 10.6% | 25.5 kB | 2 | |
| script | 8.3% | 19.8 kB | 3 | |
| image | 6.7% | 16.0 kB | 1 | |
| stylesheet | 1% | 2.4 kB | 2 | |
| Total | 239 kB | 18 |
Third parties 1 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| goatcounter.com | 381 B | 0 ms | |
| Total | 381 B | 0 ms |
Without JavaScript
The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.
97.1% of pixels differ — they have almost nothing in common. 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 | 358 ms | ↑ +8 ms (+2.4%) 349 ms – 365 ms | |
| Long Tasks | 0 | → no change 0 – 0 | |
| DOM Elements | 291 | → no change 291 – 291 | |
| 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 | 46% | 164 ms | |
| script evaluation | 24% | 84 ms | |
| style layout | 20% | 72 ms | |
| parse HTML | 7% | 25 ms | |
| paint composite render | 3% | 10 ms | |
| script parse compile | 1% | 3 ms | |
| Total | 358 ms |
Axe violations axe-core 4.13.0, full rule set
1 violating node across 1 rule, 396 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.
-
moderate
region— All page content should be contained by landmarks 1 node
Hygiene
Measurement log
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 10, 2026, 9:30 PM UTC | 99 | 1.69 s | 0 | 0 ms | 239 kB | 3/3 | ±0 | 2,470 -1% | 22.3s |
|
|
| Sep 3, 2026, 7:21 PM UTC | 100 | 1.47 s | 0 | 0 ms | 240 kB | 3/3 | ±0 | 2,454 -1% | 23.3s |
|
|
| Aug 27, 2026, 4:12 PM UTC | 100 | 1.29 s | 0 | 0 ms | 309 kB | 3/3 | ±0 | 2,485 0% | 21.7s |
|
|
| Aug 20, 2026, 3:40 PM UTC | 99 | 1.83 s | 0 | 0 ms | 240 kB | 3/3 | ±3 | 2,340 -6% | 30s |
|
Embed this score
Use this web component to show alistairshepherd.uk'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://alistairshepherd.uk/"></speedlify2-score>