CDN impact
Time to first byte by CDN provider, measured in real-user Chrome data.
1
At a glance the headline numbers for CDN impact
Time to first byte by CDN provider, measured in real-user Chrome data.
15
Providers ranked
After min-sites filter
162,178
Sites in sample
Combined across all items
1.4s
Best FCP (p75)
KeyCDN
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by FCP at p75, fastest first
| # | Provider | FCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | KeyCDN | 1.4s | 89.5% | 620 | |
| 2 | Vercel Edge | 1.4s | 86.6% | 1,458 | |
| 3 | Google Cloud CDN | 1.4s | 85.6% | 16,124 | |
| 4 | Azure CDN | 1.4s | 85.3% | 197 | |
| 5 | Netlify Edge | 1.5s | 83.8% | 548 | |
| 6 | Akamai | 1.5s | 83.3% | 3,939 | |
| 7 | jsDelivr | 1.5s | 82.1% | 6,936 | |
| 8 | Bunny CDN | 1.5s | 81.9% | 9,060 | |
| 9 | Fastly | 1.6s | 82.1% | 42,269 | |
| 10 | CloudFront | 1.6s | 81.7% | 26,296 | |
| 11 | Cloudflare | 1.6s | 81.2% | 42,570 | |
| 12 | cdnjs | 1.6s | 79.6% | 8,930 | |
| 13 | Imperva/Incapsula | 1.7s | 76.9% | 242 | |
| 14 | unpkg | 1.8s | 75.9% | 2,887 | |
| 15 | Sucuri | 2.0s | 69.7% | 102 |
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing FCP per CDN which group passes the FCP most often
CDNSitesPassing FCPp75
KeyCDN 0.7% 620 1.4s
Vercel Edge 1.5% 1,458 1.4s
Google Cloud CDN 17% 16,124 1.4s
Azure CDN 0.2% 197 1.4s
Netlify Edge 0.6% 548 1.5s
Akamai 4.2% 3,939 1.5s
Fastly 44.5% 42,269 1.6s
jsDelivr 7.3% 6,936 1.5s
Bunny CDN 9.5% 9,060 1.5s
CloudFront 27.7% 26,296 1.6s
Cloudflare 44.9% 42,570 1.6s
cdnjs 9.4% 8,930 1.6s
Imperva/Incapsula 0.3% 242 1.7s
unpkg 3% 2,887 1.8s
Sucuri 0.1% 102 2.0s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good FCP (1.8s at p75) · one value per site
90% of KeyCDN sites pass FCP. Sucuri trails 20 points behind, leaving 30% of its sites failing. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop 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
Cloudflare 44.9%
852.0s
9970ms
770.10
811.6s
611.1s
Fastly 44.5%
852.0s
9972ms
760.10
821.6s
631.1s
CloudFront 27.7%
852.1s
9876ms
760.10
821.6s
621.1s
Google Cloud CDN 17%
871.9s
9878ms
780.09
861.4s
72875ms
Bunny CDN 9.5%
862.0s
9969ms
770.10
821.5s
621.1s
cdnjs 9.4%
852.1s
9966ms
760.10
801.6s
611.1s
jsDelivr 7.3%
872.0s
9968ms
770.10
821.5s
641.1s
Akamai 4.2%
872.0s
9968ms
780.09
831.5s
621.1s
unpkg 3%
802.3s
9970ms
750.11
761.8s
571.3s
Vercel Edge 1.5%
872.0s
9889ms
760.10
871.4s
80645ms
KeyCDN 0.7%
911.9s
9981ms
770.10
901.4s
76784ms
Netlify Edge 0.6%
812.3s
9389ms
790.09
841.5s
671.0s
Imperva/Incapsula 0.3%
742.5s
9687ms
660.17
771.7s
64990ms
Azure CDN 0.2%
842.1s
10079ms
760.10
851.4s
74813ms
Sucuri 0.1%
742.5s
10057ms
610.18
702.0s
391.7s
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.
KeyCDN leads on FCP: 90% of its sites pass. Sucuri trails at 70%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
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Related signals Marketing pixels (10) → Bot detection (7) → Forms (3) → Personalization (5) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.