Svelte Core Web Vitals
How real Chrome users experience svelte.dev, from Google's Chrome UX Report: the 75th percentile of visits on every device.
Svelte passes Core Web Vitals
Sep 26 – Oct 23, all devices
INP
55 ms
Good
LCP
878 ms
Good
CLS
0.00
Good
FCP
808 ms
Good
TTFB
367 ms
Good
INP over time
Weekly p75. The dashed line is the 200 ms "good" threshold.
What the numbers say
- Svelte passes Core Web Vitals: LCP 878 ms, CLS 0.00, INP 55 ms are all in Google's "good" range for 3 in 4 visits.
- Among 23 frameworks and docs sites we track, Svelte has the 2nd fastest LCP.
- INP has held steady around 55 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 |
| Astro | Passes | 983 ms | 35 ms | 0.00 |
| Nuxt | Passes | 1.5 s | 129 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 |