starlight.astro.build
https://starlight.astro.build/
Ranks Overall #58 Astro Showcase #1
Data from Oct 2, 2026, 7:00 PM UTC old Measured once a month · 1 run since Oct 2, 2026
Elsewhere:
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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 FIELD
Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-02 → 2026-09-29), url-level.
| Metric | Lab Simulated | Field | |||
|---|---|---|---|---|---|
| Value | Change / range | Trend | p75 | Distribution | |
| LCP CWV Largest Contentful Paint | 1.84 s good | — 1.84 s – 1.84 s | 935 ms good | 94.7% 4.5% 0.8% | |
| INP CWV Interaction to Next Paint — field only, no lab run can measure it | n/a | — | 65 ms good | 96.9% 2.7% 0.4% | |
| CLS CWV Cumulative Layout Shift | 0 good | — 0 – 0 | 0 good | 98.9% 1.1% 0% | |
| TBT Total Blocking Time | 0 ms good | — 0 ms – 0 ms | n/a | — | |
| FCP First Contentful Paint | 1.06 s good | — 1.06 s – 1.06 s | 871 ms good | 91.2% 6.7% 2.2% | |
| Speed Index | 1.06 s good | — 1.06 s – 1.06 s | n/a | — | |
| TTFB Time to First Byte | 613 ms good | — 613 ms – 613 ms | 618 ms good | 82.7% 13.7% 3.7% | |
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.
LCP LAB Simulated vs LCP FIELD
The lab LCP is 1.97× the field p75 — real users likely have above-average hardware or network connectivity.
Page weight
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Page Weight | 135 kB | — 135 kB – 135 kB | |
| Requests | 21 | — 21 – 21 | |
| Third-party Weight | 3.2 kB | — 3.2 kB – 3.2 kB | |
| Third-party CPU | 2 ms | — 2 ms – 2 ms | |
| Unused JS | 0 B | — 0 B – 0 B | |
| Unused CSS | 0 B | — 0 B – 0 B |
By resource type
| Type | Transfer | Share | Size | Requests |
|---|---|---|---|---|
| image | 45.8% | 61.7 kB | 13 | |
| document | 27% | 36.5 kB | 1 | |
| script | 17.9% | 24.2 kB | 4 | |
| stylesheet | 8.6% | 11.6 kB | 2 | |
| other | 0.6% | 849 B | 1 | |
| Total | 135 kB | 21 |
Third parties 1 entities
| Entity | Transfer | Size | Main thread Simulated |
|---|---|---|---|
| Fathom Analytics | 3.2 kB | 2 ms | |
| Total | 3.2 kB | 2 ms |
Without JavaScript
The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.
94.6% of pixels differ — the page changes substantially. 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 | 396 ms | — 396 ms – 396 ms | |
| Long Tasks | 0 | — 0 – 0 | |
| DOM Elements | 332 | — 332 – 332 | |
| Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) | 0 | — 0 – 0 | |
| A11y Failures | 0 | — 0 – 0 | |
| A11y Failing Nodes | 0 | — 0 – 0 |
Main thread work
| Task | Time | Share | Duration Simulated |
|---|---|---|---|
| other | 50% | 197 ms | |
| style layout | 24% | 95 ms | |
| script evaluation | 13% | 53 ms | |
| parse HTML | 7% | 30 ms | |
| paint composite render | 4% | 17 ms | |
| script parse compile | 1% | 5 ms | |
| Total | 396 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
Field history 25 weeks
Weekly p75 from the CrUX History API, backfilled in a single request.
| Week ending | LCP | INP | CLS | FCP | TTFB |
|---|---|---|---|---|---|
| 2026-09-26 | 939 ms | 68 ms | 0 | 876 ms | 618 ms |
| 2026-09-19 | 1.00 s | 69 ms | 0 | 923 ms | 704 ms |
| 2026-09-12 | 1.04 s | 67 ms | 0 | 957 ms | 761 ms |
| 2026-09-05 | 1.13 s | 69 ms | 0 | 1.02 s | 838 ms |
| 2026-08-29 | 1.17 s | 70 ms | 0 | 1.05 s | 860 ms |
| 2026-08-22 | 1.09 s | 68 ms | 0 | 1.03 s | 812 ms |
| 2026-08-15 | 1.08 s | 70 ms | 0 | 1.02 s | 794 ms |
| 2026-08-08 | 1.07 s | 70 ms | 0 | 991 ms | 766 ms |
| 2026-08-01 | 1.06 s | 70 ms | 0 | 987 ms | 755 ms |
| 2026-07-25 | 1.14 s | 72 ms | 0 | 1.03 s | 776 ms |
| 2026-07-18 | 1.17 s | 70 ms | 0 | 1.03 s | 717 ms |
| 2026-07-11 | 1.16 s | 70 ms | 0 | 1.03 s | 708 ms |
Runs
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2, 2026, 7:00 PM UTC | 100 | 1.84 s | 0 | 0 ms | 135 kB | 3/3 | ±0 | 2,462 -1% | 24.1s |
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