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
347,010
Sites in sample
Combined across all items
1.4s
Best FCP (p75)
KeyCDN
The State of Web Vitals · October 2026 · 210,902 crawled 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 | 88.1% | 1,307 | |
| 2 | Vercel Edge | 1.4s | 86.1% | 3,180 | |
| 3 | Google Cloud CDN | 1.4s | 85.6% | 34,465 | |
| 4 | Netlify Edge | 1.5s | 83.4% | 1,165 | |
| 5 | Akamai | 1.5s | 83.4% | 8,164 | |
| 6 | jsDelivr | 1.5s | 82.6% | 14,565 | |
| 7 | Azure CDN | 1.5s | 82.7% | 907 | |
| 8 | Fastly | 1.6s | 81.9% | 90,115 | |
| 9 | Bunny CDN | 1.6s | 81.3% | 19,200 | |
| 10 | CloudFront | 1.6s | 81.4% | 56,531 | |
| 11 | Cloudflare | 1.6s | 81.1% | 91,586 | |
| 12 | cdnjs | 1.6s | 79.7% | 18,880 | |
| 13 | Imperva/Incapsula | 1.7s | 77.1% | 523 | |
| 14 | unpkg | 1.8s | 75.6% | 6,211 | |
| 15 | Sucuri | 2.2s | 63.6% | 211 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing FCP per CDN which group passes the FCP most often
CDNSitesPassing FCPp75
KeyCDN 0.6% 1,307 1.4s
Vercel Edge 1.5% 3,180 1.4s
Google Cloud CDN 16.3% 34,465 1.4s
Akamai 3.9% 8,164 1.5s
Netlify Edge 0.6% 1,165 1.5s
Azure CDN 0.4% 907 1.5s
jsDelivr 6.9% 14,565 1.5s
Fastly 42.7% 90,115 1.6s
CloudFront 26.8% 56,531 1.6s
Bunny CDN 9.1% 19,200 1.6s
Cloudflare 43.4% 91,586 1.6s
cdnjs 9% 18,880 1.6s
Imperva/Incapsula 0.2% 523 1.7s
unpkg 2.9% 6,211 1.8s
Sucuri 0.1% 211 2.2s
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
88% of KeyCDN sites pass FCP. Sucuri trails 24 points behind, leaving 36% of its sites failing. computed
The State of Web Vitals · October 2026 · 210,902 crawled 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 43.4%
852.0s
9970ms
770.10
811.6s
611.1s
Fastly 42.7%
852.0s
9973ms
760.10
821.6s
631.1s
CloudFront 26.8%
852.1s
9877ms
750.10
811.6s
621.1s
Google Cloud CDN 16.3%
872.0s
9878ms
780.09
861.4s
72879ms
Bunny CDN 9.1%
862.0s
9970ms
760.10
811.6s
621.1s
cdnjs 9%
842.1s
9967ms
750.10
801.6s
601.2s
jsDelivr 6.9%
872.0s
9969ms
770.09
831.5s
641.1s
Akamai 3.9%
872.0s
9970ms
780.09
831.5s
621.1s
unpkg 2.9%
802.2s
9973ms
740.11
761.8s
561.3s
Vercel Edge 1.5%
872.0s
9890ms
780.09
861.4s
79664ms
KeyCDN 0.6%
891.9s
9985ms
780.09
881.4s
75787ms
Netlify Edge 0.6%
812.3s
9492ms
780.09
831.5s
71941ms
Azure CDN 0.4%
862.0s
9891ms
760.10
831.5s
661.0s
Imperva/Incapsula 0.2%
812.3s
9781ms
700.13
771.7s
66942ms
Sucuri 0.1%
702.7s
10060ms
680.14
642.2s
381.7s
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: 88% of its sites pass. Sucuri trails at 64%. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · desktop field datacorewebvitals.io/state-of-cwv
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Related signals Marketing pixels (10) → Bot detection (8) → Forms (4) → Personalization (6) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured
210,902 crawled sites with Chrome field data, representing millions of real page loads. How we measured.