Gatsby — Core Web Vitals

Field data PhoneDesktopAll October 2026 edition · All devices field outcomes
48.6% of Gatsby sites pass all three Core Web Vitals
  • #8 of 11 frameworks by overall pass rate
  • Add TTFB and only 38.1% still pass
  • Runs on 0.1% of all sites measured (218 crawled Gatsby sites, 214 with field data)

The distribution, not just the median

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

LCP 2.6s p75
71.4% good ▼ fleet 82.5%
INP 180ms p75
81.8% good ▼ fleet 94.7%
CLS 0.19 p75
64.9% good ▼ fleet 87.8%
TTFB diagnostic 755ms p75
77.7% good ▲ fleet 58.7%
FCP diagnostic 1.4s p75
92.5% good ▲ fleet 76.6%
Where Gatsby loses ground: CLS — 64.9% of sites pass, against 87.8% across the fleet. The fingerprint below shows which habits move that number.

framework standings

All frameworks →

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