The State of Web Vitals

CDN performance

Performance breakdown by cdn.

Field data PhoneDesktopAll Scope All sites October 2026 edition · All devices field outcomes
Metric TTFB LCP INP CLS FCP
1

At a glance the headline numbers for CDN performance

Performance breakdown by cdn.

88.3%
Best: No CDN (origin)
good CLS
86.4%
Typical CDN
good CLS
70.0%
Worst: Netlify
good CLS

No CDN (origin) passes CLS most often of any CDN. 88.3% of its sites pass. Netlify passes least at 70.0%. The gap is 18 percentage points.

The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by CLS at p75, fastest first

# CDN CLS p75 Passing Sites
1 Fastly 0.02 88.2%
6,980
2 No CDN (origin) 0.03 88.3%
158,548
3 Akamai 0.04 86.4%
5,431
4 Cloudflare 0.04 88.3%
26,787
5 Vercel 0.05 84.8%
1,171
6 CloudFront 0.09 78.0%
6,917
7 Netlify 0.15 70.0%
410
The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
3

Passing CLS per CDN which group passes the CLS most often

CDNSitesPassing CLSp75
No CDN (origin) 75.2% 158,548 88% 0.03
Cloudflare 12.7% 26,787 88% 0.04
Fastly 3.3% 6,980 88% 0.02
Akamai 2.6% 5,431 86% 0.04
Vercel 0.6% 1,171 85% 0.05
CloudFront 3.3% 6,917 78% 0.09
Netlify 0.2% 410 70% 0.15
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site

88% of No CDN (origin) sites pass CLS. Netlify trails 18 points behind, leaving 30% of its sites failing. computed

The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
4

All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75

LCP
INP
CLS
FCP
TTFB
No CDN (origin) 75.2%
822.2s
95106ms
880.03
751.8s
561.3s
Cloudflare 12.7%
862.0s
94116ms
880.04
821.6s
69947ms
Fastly 3.3%
862.0s
94104ms
880.02
831.5s
72873ms
CloudFront 3.3%
812.2s
92136ms
780.09
781.7s
631.1s
Akamai 2.6%
832.1s
97110ms
860.04
791.7s
591.1s
Vercel 0.6%
822.2s
91149ms
850.05
791.7s
89551ms
Netlify 0.2%
772.5s
74219ms
700.15
751.8s
481.1s
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites

One row per CDN, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.

No CDN (origin) leads on CLS: 88% of its sites pass. Netlify trails at 70%. computed

The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
5

Why this matters for the Core Web Vitals, and where to start fixing it

A CDN sits between your server and your visitors, serving content from a location near each of them instead of from a single origin. That shortens the trip every request makes, which shows up first in Time to First Byte and then in how quickly the main content can paint. A good CDN also handles caching, compression and modern protocols, so the gains reach well beyond raw distance.

Start by making sure the CDN is actually caching your pages and assets rather than passing everything through to the origin. Turn on compression and HTTP/2 or HTTP/3, set sensible cache headers, and check that your largest image is served from the edge. A CDN that passes every request through to the origin gives you almost none of this.

How does your CDN affect Core Web Vitals?

Among the most-used CDNs, Fastly reaches a good CLS on 88.2% of sites; Netlify on 70.0%.

Go fix it Configure Cloudflare for Core Web Vitals → Resource prioritization guide → 103 Early Hints →
Related signals CMS (12) → Frameworks (11) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured