The State of Web Vitals · Framework

Svelte — Core Web Vitals

Field data PhoneDesktopAll October 2026 edition · All devices field outcomes
67.3% of Svelte sites pass all three Core Web Vitals
  • #5 of 11 frameworks by overall pass rate
  • Add TTFB and only 53.4% still pass
  • Runs on 0.2% of all sites measured (467 crawled Svelte sites, 459 with field data)

The distribution, not just the median

Each bar is the good / needs-work / poor split for Svelte. The marks where the whole fleet sits, so you can see who is ahead and who is behind.

LCP 2.1s p75
83.3% good ▲ fleet 82.5%
INP 138ms p75
92.3% good ▼ fleet 94.7%
CLS 0.05 p75
85.4% good ▼ fleet 87.8%
TTFB diagnostic 885ms p75
71.2% good ▲ fleet 58.7%
FCP diagnostic 1.6s p75
81.8% good ▲ fleet 76.6%
Where Svelte loses ground: CLS — 85.4% of sites pass, against 87.8% across the fleet. The fingerprint below shows which habits move that number.

framework standings

#1 htmx 79.8% #2 Alpine 79.4% #3 React 76.1% #4 jQuery 70.4% #5 Svelte 67.3% #6 Vue 63.6% #7 Remix 58.7% #8 Gatsby 48.6% #9 Nuxt 48.1% #10 Next.js 46.5% #11 Angular 37.4%
All frameworks →

210,902 crawled sites (196,263 with Chrome field data), representing millions of real page loads, October 2026 edition. How we measured.