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
349,415
Sites in sample
Combined across all items
1.5s
Best FCP (p75)
KeyCDN
The State of Web Vitals · October 2026 · 212,308 crawled sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by FCP at p75, fastest first
| # | Provider | FCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | KeyCDN | 1.5s | 83.8% | 1,318 | |
| 2 | Google Cloud CDN | 1.6s | 81.4% | 34,694 | |
| 3 | Vercel Edge | 1.8s | 76.2% | 3,202 | |
| 4 | Fastly | 1.8s | 75.8% | 90,723 | |
| 5 | jsDelivr | 1.8s | 75.7% | 14,660 | |
| 6 | Bunny CDN | 1.8s | 75.2% | 19,338 | |
| 7 | CloudFront | 1.8s | 74.9% | 56,884 | |
| 8 | Azure CDN | 1.8s | 74.8% | 934 | |
| 9 | Akamai | 1.8s | 74.3% | 8,225 | |
| 10 | Cloudflare | 1.8s | 74.3% | 92,254 | |
| 11 | cdnjs | 1.8s | 73.7% | 19,009 | |
| 12 | Netlify Edge | 1.9s | 71.9% | 1,170 | |
| 13 | Imperva/Incapsula | 1.9s | 71.3% | 526 | |
| 14 | unpkg | 2.1s | 67.2% | 6,266 | |
| 15 | Sucuri | 2.3s | 57.1% | 212 |
The State of Web Vitals · October 2026 · 212,308 crawled sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing FCP per CDN which group passes the FCP most often
CDNSitesPassing FCPp75
KeyCDN 0.6% 1,318 1.5s
Google Cloud CDN 16.3% 34,694 1.6s
Vercel Edge 1.5% 3,202 1.8s
Fastly 42.7% 90,723 1.8s
jsDelivr 6.9% 14,660 1.8s
Bunny CDN 9.1% 19,338 1.8s
CloudFront 26.8% 56,884 1.8s
Azure CDN 0.4% 934 1.8s
Cloudflare 43.5% 92,254 1.8s
Akamai 3.9% 8,225 1.8s
cdnjs 9% 19,009 1.8s
Netlify Edge 0.6% 1,170 1.9s
Imperva/Incapsula 0.2% 526 1.9s
unpkg 3% 6,266 2.1s
Sucuri 0.1% 212 2.3s
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
84% of KeyCDN sites pass FCP. Sucuri trails 27 points behind, leaving 43% of its sites failing. computed
The State of Web Vitals · October 2026 · 212,308 crawled sites · phone 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 43.5%
802.3s
91137ms
870.03
741.8s
601.2s
Fastly 42.7%
812.2s
91139ms
860.03
761.8s
611.1s
CloudFront 26.8%
802.3s
90145ms
850.04
751.8s
611.1s
Google Cloud CDN 16.3%
842.1s
90145ms
880.03
811.6s
72860ms
Bunny CDN 9.1%
812.2s
93133ms
880.03
751.8s
591.2s
cdnjs 9%
812.3s
93132ms
870.03
741.8s
601.2s
jsDelivr 6.9%
822.2s
92137ms
870.03
761.8s
611.1s
Akamai 3.9%
792.3s
92137ms
870.03
741.8s
551.2s
unpkg 3%
752.5s
90144ms
850.04
672.1s
531.3s
Vercel Edge 1.5%
792.4s
86165ms
840.04
761.8s
78728ms
KeyCDN 0.6%
872.0s
91147ms
890.04
841.5s
74812ms
Netlify Edge 0.6%
722.6s
77191ms
750.11
721.9s
531.1s
Azure CDN 0.4%
802.3s
82172ms
860.06
751.8s
611.1s
Imperva/Incapsula 0.2%
762.5s
83170ms
810.08
711.9s
64998ms
Sucuri 0.1%
682.8s
96134ms
850.05
572.3s
351.7s
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: 84% of its sites pass. Sucuri trails at 57%. computed
The State of Web Vitals · October 2026 · 212,308 crawled sites · phone field datacorewebvitals.io/state-of-cwv
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Related signals Marketing pixels (10) → Bot detection (8) → Forms (4) → Personalization (6) → 212,308 crawled sites with Chrome field data, representing millions of real page loads · How we measured
212,308 crawled sites with Chrome field data, representing millions of real page loads. How we measured.