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
700ms
Best TTFB (p75)
Vercel Edge
The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by TTFB at p75, fastest first
| # | Provider | TTFB p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Vercel Edge | 700ms | 79.8% | 3,180 | |
| 2 | Google Cloud CDN | 843ms | 73.3% | 34,465 | |
| 3 | KeyCDN | 953ms | 69.9% | 1,307 | |
| 4 | Imperva/Incapsula | 979ms | 67.7% | 523 | |
| 5 | Azure CDN | 1.0s | 62.9% | 907 | |
| 6 | jsDelivr | 1.1s | 61.9% | 14,565 | |
| 7 | Netlify Edge | 1.1s | 54.3% | 1,165 | |
| 8 | Fastly | 1.1s | 61.4% | 90,115 | |
| 9 | CloudFront | 1.1s | 60.7% | 56,531 | |
| 10 | cdnjs | 1.2s | 60.1% | 18,880 | |
| 11 | Akamai | 1.2s | 56.7% | 8,164 | |
| 12 | Bunny CDN | 1.2s | 59.3% | 19,200 | |
| 13 | Cloudflare | 1.2s | 59.1% | 91,586 | |
| 14 | unpkg | 1.4s | 52.6% | 6,211 | |
| 15 | Sucuri | 1.7s | 40.0% | 211 |
The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing TTFB per CDN which group passes the TTFB most often
CDNSitesPassing TTFBp75
Vercel Edge 1.5% 3,180 700ms
Google Cloud CDN 16.3% 34,465 843ms
KeyCDN 0.6% 1,307 953ms
Imperva/Incapsula 0.2% 523 979ms
Azure CDN 0.4% 907 1.0s
jsDelivr 6.9% 14,565 1.1s
Fastly 42.7% 90,115 1.1s
CloudFront 26.8% 56,531 1.1s
cdnjs 9% 18,880 1.2s
Bunny CDN 9.1% 19,200 1.2s
Cloudflare 43.4% 91,586 1.2s
Akamai 3.9% 8,164 1.2s
Netlify Edge 0.6% 1,165 1.1s
unpkg 2.9% 6,211 1.4s
Sucuri 0.1% 211 1.7s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good TTFB (800ms at p75) · one value per site
80% of Vercel Edge sites pass TTFB. Sucuri trails 40 points behind, leaving 60% 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
Cloudflare 43.4%
822.2s
95116ms
860.05
761.8s
591.2s
Fastly 42.7%
822.2s
94118ms
860.05
771.7s
611.1s
CloudFront 26.8%
812.2s
94122ms
840.05
771.7s
611.1s
Google Cloud CDN 16.3%
852.1s
94123ms
880.04
831.5s
73843ms
Bunny CDN 9.1%
822.2s
96113ms
860.05
771.7s
591.2s
cdnjs 9%
822.2s
96112ms
850.05
761.8s
601.2s
jsDelivr 6.9%
842.1s
95115ms
860.04
781.7s
621.1s
Akamai 3.9%
812.2s
95118ms
850.05
771.7s
571.2s
unpkg 2.9%
762.4s
93122ms
840.06
702.0s
531.4s
Vercel Edge 1.5%
812.3s
91143ms
850.05
791.7s
80700ms
KeyCDN 0.6%
852.1s
95127ms
860.05
821.6s
70953ms
Netlify Edge 0.6%
762.5s
84160ms
760.10
741.8s
541.1s
Azure CDN 0.4%
832.2s
90147ms
830.07
771.7s
631.0s
Imperva/Incapsula 0.2%
792.3s
92125ms
790.10
731.9s
68979ms
Sucuri 0.1%
702.7s
98104ms
800.08
622.3s
401.7s
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.
Vercel Edge leads on TTFB: 80% of its sites pass. Sucuri trails at 40%. computed
The State of Web Vitals · October 2026 · 210,902 crawled sites · all devices 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.