Cookie count and the Core Web Vitals
30.5% of audited sites (61,864) set zero cookies on initial load and pass LCP at 89% (1.2s median), whereas the 24.6% setting 6 or more cookies pass at 81% (1.6s median).
30.5% of sites use 0 cookies cookie count, and 89% of those sites have a good LCP, against 86% of all sites.
LCP pass rate
Sites with 0 cookies cookie count have a good LCP most often: 89%, against 86% of all sites. Sites with 6 or more cookies cookies have it least often, at 81%.
Cookie count usage
0 cookies is the most used: 30.5% of sites.
The four LCP phases
Across the four LCP sub-parts in Chrome's field data, the largest gap between 0 cookies and 6 or more cookies sits in time to first byte (TTFB): 496 ms median for 0 cookies against 683 ms for 6 or more cookies. Overall median field LCP is 1.2s for 0 cookies (TTFB 496 ms, load delay 219 ms, load duration 100 ms, render delay 164 ms) versus 1.6s for 6 or more cookies.
Understanding cookie count
How cookie proliferation signals CDN bypass and tracker bloat
High cookie counts reflect two compounding problems: origin Set-Cookie headers that force CDNs to bypass full-page HTML caching, and heavy marketing/ad-tech tags firing during page load. Across 61,864 sites (30.5%) setting zero cookies, 89% pass field LCP at a 1.2s median, compared with 81% (1.6s median) on the 24.6% (49,910) setting 6+ cookies.
Avoid setting session or personalization cookies on anonymous landing pages so CDN edge caches can serve full HTML without Set-Cookie bypasses, and gate marketing cookies behind consent interaction. Across all audited sites, 30.5% set zero cookies (89% good LCP, 1.2s median) versus 24.6% setting 6+ cookies (81% good LCP, 1.6s median).
How cookie count plays out per platform
What the field data shows when you isolate a single CMS or framework.
WordPress 65,939 sites WordPress sites setting 6+ cookies pass LCP 18 points less often than sites with 0 cookies.
Across WordPress sites, 28% set zero cookies on initial load (86% good LCP, 1.5s median) and 35% set 6 or more cookies (68% good LCP, 2.0s median).
React 9,658 sites React sites with 6+ cookies pass LCP 24 points less often than sites with 3 to 5 cookies.
Across React sites, 43% set 3 to 5 cookies (89% good LCP, 1.3s median) and 19% set 6 or more cookies (65% good LCP, 2.0s median).
By Arjen Karel · 212,308 crawled sites (70,213 with desktop Chrome field data, 203,027 sites with cookie count, October 2026). How we measured.