Astro Core Web Vitals
How real Chrome users experience astro.build, from Google's Chrome UX Report: the 75th percentile of visits on every device.
Astro passes Core Web Vitals
Sep 27 – Oct 24, all devices
INP
35 ms
Good
LCP
983 ms
Good
CLS
0.00
Good
FCP
918 ms
Good
TTFB
715 ms
Good
INP over time
Weekly p75. The dashed line is the 200 ms "good" threshold.
What the numbers say
- Astro passes Core Web Vitals: LCP 983 ms, CLS 0.00, INP 35 ms are all in Google's "good" range for 3 in 4 visits.
- Among 23 frameworks and docs sites we track, Astro has the 4th fastest LCP.
- INP has held steady around 35 ms over the last 25 weeks.
Keep a site like this from getting slower
Real-user data shows a regression weeks after it ships. Vitalgate runs Lighthouse on every pull request and fails the check when a change breaks budgets like these: LCP ≤ 2.5 s, CLS ≤ 0.10, FCP ≤ 1.8 s.
Other frameworks and docs sites
| Site | Core Web Vitals | LCP | INP | CLS |
|---|---|---|---|---|
| React | Passes | 1.2 s | 78 ms | 0.00 |
| Next.js | Passes | 1.2 s | 85 ms | 0.00 |
| Vue | Fails | 1.3 s | 64 ms | 0.11 |
| Svelte | Passes | 878 ms | 55 ms | 0.00 |
| Nuxt | Passes | 1.5 s | 128 ms | 0.02 |
| Angular | Passes | 1.5 s | 78 ms | 0.06 |
| Remix | Passes | 1.4 s | 124 ms | 0.00 |
| Vite | Passes | 1.3 s | 67 ms | 0.04 |
| Tailwind CSS | Passes | 1.3 s | 73 ms | 0.00 |
| TypeScript | Passes | 1.5 s | 60 ms | 0.05 |
| MDN | Passes | 1.0 s | 52 ms | 0.01 |
| web.dev | Fails | 2.7 s | 134 ms | 0.09 |
| Node.js | Passes | 1.1 s | 115 ms | 0.01 |
| Deno | Passes | 2.0 s | 63 ms | 0.00 |
| Bun | Passes | 1.3 s | 95 ms | 0.01 |
| Python | Passes | 909 ms | 23 ms | 0.03 |
| Django | Passes | 1.2 s | 37 ms | 0.00 |
| Laravel | Passes | 2.3 s | 135 ms | 0.01 |
| Ruby on Rails | Passes | 786 ms | 45 ms | 0.03 |
| Go | Passes | 1.6 s | 45 ms | 0.02 |
| TanStack | Fails | 2.7 s | 176 ms | 0.01 |
| shadcn/ui | Passes | 1.0 s | 171 ms | 0.00 |