At a glance the headline numbers for CDN performance
Performance breakdown by cdn.
Fastly passes FCP most often of any CDN. 82.6% of its sites pass. No CDN (origin) (the most-used CDN) passes least at 75.3%. The gap is 7 percentage points.
The ranking sorted by FCP at p75, fastest first
| # | CDN | FCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Fastly | 1.5s | 82.6% | 6,980 | |
| 2 | Cloudflare | 1.6s | 81.8% | 26,787 | |
| 3 | Akamai | 1.7s | 78.9% | 5,431 | |
| 4 | Vercel | 1.7s | 78.8% | 1,171 | |
| 5 | CloudFront | 1.7s | 77.8% | 6,917 | |
| 6 | No CDN (origin) | 1.8s | 75.3% | 158,548 | |
| 7 | Netlify | 1.8s | 75.0% | 410 |
Passing FCP per CDN which group passes the FCP most often
83% of Fastly sites pass FCP. Netlify trails 8 points behind. computed
All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75
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.
Fastly leads on FCP: 83% of its sites pass. Netlify trails at 75%. computed
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 FCP on 82.6% of sites; Netlify on 75.0%.
210,902 crawled sites with Chrome field data, representing millions of real page loads. How we measured.