astro.build
Ranks Overall #377 Developer Tooling #5 Site Generators #2
Data from Oct 6, 2026, 11:00 PM UTC old Measured every 2 days · 26 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
Filmstrip LAB Throttled
How the page drew during the measured load, at 8 points across 3.00 s. Compare this filmstrip against another site.
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375 ms
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750 ms
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1.13 s
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1.50 s
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1.88 s
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2.25 s
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2.63 s
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3.00 s
Lighthouse Scores LAB Simulated
Metrics LAB FIELD
Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-07 → 2026-10-04), url-level.
| Metric | Lab Simulated | Field | |||
|---|---|---|---|---|---|
| Value | Change / range | Trend | p75 | Distribution | |
| LCP CWV Largest Contentful Paint | 2.96 s needs work | ↑ +3 ms (+0.1%) 2.20 s – 4.90 s | 1.19 s good | 93.7% 4.3% 2% | |
| INP CWV Interaction to Next Paint — field only, no lab run can measure it | n/a | — | 113 ms good | 93% 6% 1% | |
| CLS CWV Cumulative Layout Shift | 0.001 good | ↑ +0.001 0 – 0.001 | 0 good | 96.4% 3.3% 0.4% | |
| TBT Total Blocking Time | 0 ms good | → no change 0 ms – 14 ms | n/a | — | |
| FCP First Contentful Paint | 1.38 s good | ↑ +3 ms (+0.2%) 1.38 s – 1.47 s | 1.20 s good | 87.5% 8.2% 4.3% | |
| Speed Index | 2.44 s good | ↑ +1061 ms (+77%) significant 1.38 s – 4.10 s | n/a | — | |
| TTFB Time to First Byte | 631 ms good | ↑ +3 ms (+0.5%) 621 ms – 677 ms | 538 ms good | 85.1% 10.4% 4.6% | |
LCP Subparts LAB Throttled
The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.
LCP LAB Simulated vs LCP FIELD
The lab LCP is 2.49× the field p75 — real users likely have above-average hardware or network connectivity.
Page weight
| Metric | Value | Change / range | Trend |
|---|---|---|---|
| Page Weight | 339 kB | ↓ -16.7 kB (-4.8%) 339 kB – 739 kB | |
| Requests | 24 | ↓ -1 (-4%) 24 – 25 | |
| Third-party Weight | 3.2 kB | → no change 3.2 kB – 3.2 kB | |
| Third-party CPU | 2 ms | ↑ +1 ms (+50%) significant 1 ms – 5 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 | 57.8% | 196 kB | 3 | |
| document | 24.8% | 84.2 kB | 1 | |
| image | 8.3% | 28.1 kB | 8 | |
| stylesheet | 6.2% | 21.1 kB | 2 | |
| script | 2.6% | 8.9 kB | 8 | |
| other | 0.2% | 650 B | 1 | |
| Total | 339 kB | 24 |
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.
0% of pixels differ — they are 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 | 564 ms | ↑ +115 ms (+25.7%) 449 ms – 689 ms | |
| Long Tasks | 1 | → no change 1 – 2 | |
| DOM Elements | 1,810 | ↓ -1 (-0.1%) 1,801 – 1,819 | |
| 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 |
|---|---|---|---|
| style layout | 37% | 210 ms | |
| other | 36% | 204 ms | |
| parse HTML | 10% | 55 ms | |
| script evaluation | 7% | 42 ms | |
| paint composite render | 7% | 38 ms | |
| garbage collection | 2% | 12 ms | |
| script parse compile | 1% | 4 ms | |
| Total | 564 ms |
Axe violations axe-core 4.13.0, full rule set
0 violating nodes across 0 rules, 1707 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 | 1.17 s | 112 ms | 0 | 1.18 s | 527 ms |
| 2026-09-19 | 1.14 s | 111 ms | 0 | 1.15 s | 521 ms |
| 2026-09-12 | 1.14 s | 111 ms | 0 | 1.15 s | 521 ms |
| 2026-09-05 | 1.15 s | 112 ms | 0 | 1.16 s | 512 ms |
| 2026-08-29 | 1.15 s | 115 ms | 0 | 1.16 s | 518 ms |
| 2026-08-22 | 1.17 s | 115 ms | 0 | 1.18 s | 518 ms |
| 2026-08-15 | 1.17 s | 113 ms | 0 | 1.18 s | 522 ms |
| 2026-08-08 | 1.16 s | 113 ms | 0 | 1.16 s | 526 ms |
| 2026-08-01 | 1.20 s | 112 ms | 0 | 1.20 s | 537 ms |
| 2026-07-25 | 1.25 s | 112 ms | 0 | 1.24 s | 583 ms |
| 2026-07-18 | 1.17 s | 108 ms | 0 | 1.17 s | 534 ms |
| 2026-07-11 | 1.21 s | 109 ms | 0 | 1.20 s | 556 ms |
Runs
Every stored run for this URL, newest first.
| When | Scores | Perf | LCP | CLS | TBT | Weight | Runs | Spread | Bench | Took | Archive |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 6, 2026, 11:00 PM UTC | 94 | 2.96 s | 0.001 | 0 ms | 339 kB | 3/3 | ±2 | 3,241 +30% | 47.3s |
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| Oct 3, 2026, 8:43 PM UTC | 94 | 2.95 s | 0 | 0 ms | 356 kB | 3/3 | ±3 | 3,137 +26% | 44.4s |
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| Oct 1, 2026, 6:53 AM UTC | 95 | 2.88 s | 0 | 0 ms | 357 kB | 3/3 | ±6 | 2,261 -9% | 49.4s |
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| Sep 29, 2026, 4:54 AM UTC | 94 | 3.03 s | 0.001 | 0 ms | 340 kB | 3/3 | ±3 | 2,334 -6% | 50s |
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| Sep 25, 2026, 5:54 AM UTC | 93 | 3.10 s | 0 | 0 ms | 357 kB | 3/3 | ±5 | 2,477 0% | 47.7s |
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| Sep 23, 2026, 12:08 AM UTC | 94 | 2.97 s | 0 | 0 ms | 357 kB | 3/3 | ±2 | 2,497 0% | 48.6s |
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| Sep 20, 2026, 11:13 PM UTC | 94 | 2.98 s | 0 | 4 ms | 366 kB | 3/3 | ±0 | 2,254 -9% | 50.1s |
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| Sep 18, 2026, 1:32 PM UTC | 95 | 2.91 s | 0 | 0 ms | 349 kB | 3/3 | ±4 | 2,370 -5% | 49.4s |
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| Sep 16, 2026, 3:56 AM UTC | 98 | 2.20 s | 0.001 | 0 ms | 366 kB | 3/3 | ±5 | 2,506 +1% | 48s |
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| Sep 14, 2026, 1:01 AM UTC | 98 | 2.20 s | 0.001 | 0 ms | 366 kB | 3/3 | ±6 | 2,501 +1% | 49.2s |
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| Sep 11, 2026, 11:08 PM UTC | 96 | 2.76 s | 0 | 0 ms | 366 kB | 3/3 | ±5 | 2,404 -3% | 51.1s |
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| Sep 9, 2026, 8:35 PM UTC | 96 | 2.74 s | 0 | 0 ms | 364 kB | 3/3 | ±5 | 3,344 +35% | 25.2s |
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| Sep 7, 2026, 7:12 PM UTC | 93 | 3.13 s | 0.001 | 0 ms | 363 kB | 3/3 | ±3 | 2,499 +1% | 30.7s |
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| Sep 5, 2026, 3:17 AM UTC | 95 | 2.87 s | 0 | 0 ms | 363 kB | 3/3 | ±4 | 2,390 -4% | 27.3s |
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| Sep 4, 2026, 12:55 AM UTC | 96 | 2.73 s | 0 | 0 ms | 363 kB | 3/3 | ±3 | 3,033 +22% | 28.5s |
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| Sep 2, 2026, 11:05 PM UTC | 92 | 3.08 s | 0 | 0 ms | 346 kB | 3/3 | ±3 | 2,338 -6% | 33s |
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| Sep 1, 2026, 8:45 PM UTC | 95 | 2.80 s | 0 | 0 ms | 363 kB | 3/3 | ±0 | 3,008 +21% | 25.8s |
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| Aug 31, 2026, 6:03 PM UTC | 94 | 2.99 s | 0 | 0 ms | 363 kB | 3/3 | ±2 | 2,313 -7% | 28.6s |
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| Aug 26, 2026, 10:44 PM UTC | 82 | 4.90 s | 0 | 14 ms | 739 kB | 3/3 | ±5 | 2,362 -5% | 32s |
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| Aug 25, 2026, 9:03 PM UTC | 82 | 4.90 s | 0 | 0 ms | 739 kB | 3/3 | ±13 | 2,236 -10% | 39.7s |
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| Aug 25, 2026, 7:31 PM UTC | 82 | 4.76 s | 0 | 0 ms | 738 kB | 3/3 | ±9 | 2,473 -1% | 32.6s |
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| Aug 24, 2026, 6:38 PM UTC | 83 | 4.61 s | 0 | 0 ms | 739 kB | 3/3 | ±17 | 2,341 -6% | 30.3s |
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| Aug 23, 2026, 6:30 PM UTC | 82 | 4.80 s | 0 | 0 ms | 738 kB | 3/3 | ±11 | 2,460 -1% | 30s |
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| Aug 22, 2026, 5:22 PM UTC | 82 | 4.76 s | 0 | 0 ms | 738 kB | 3/3 | ±18 | 3,381 +36% | 27.6s |
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| Aug 21, 2026, 4:37 PM UTC | 82 | 4.77 s | 0 | 0 ms | 738 kB | 3/3 | ±10 | 2,692 +8% | 29.1s |
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| Aug 20, 2026, 4:29 PM UTC | 97 | 2.48 s | 0 | 0 ms | 346 kB | 3/3 | ±17 | 2,487 0% | 28.7s |
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