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
310,278
Sites in sample
Combined across all items
1.6s
Best FCP (p75)
KeyCDN
The State of Web Vitals · Q2 2026 · 189,915 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 | 1.6s | 83.9% | 1,168 | |
| 2 | Google Cloud CDN | 1.6s | 81.3% | 30,748 | |
| 3 | Azure CDN | 1.7s | 79.1% | 394 | |
| 4 | Fastly | 1.8s | 75.7% | 80,918 | |
| 5 | Vercel Edge | 1.8s | 75.7% | 2,717 | |
| 6 | jsDelivr | 1.8s | 75.4% | 13,065 | |
| 7 | Bunny CDN | 1.8s | 74.9% | 17,219 | |
| 8 | CloudFront | 1.8s | 74.8% | 50,794 | |
| 9 | Akamai | 1.8s | 74.5% | 7,352 | |
| 10 | Cloudflare | 1.8s | 74.1% | 81,609 | |
| 11 | cdnjs | 1.8s | 73.6% | 17,025 | |
| 12 | Netlify Edge | 1.9s | 72.6% | 1,025 | |
| 13 | Imperva/Incapsula | 1.9s | 72.4% | 473 | |
| 14 | unpkg | 2.1s | 67.2% | 5,586 | |
| 15 | Sucuri | 2.3s | 57.8% | 185 |
The State of Web Vitals · Q2 2026 · 189,915 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%
1,168
1.6s
Google Cloud CDN 16.2%
30,748
1.6s
Azure CDN 0.2%
394
1.7s
Fastly 42.6%
80,918
1.8s
Vercel Edge 1.4%
2,717
1.8s
jsDelivr 6.9%
13,065
1.8s
Bunny CDN 9.1%
17,219
1.8s
CloudFront 26.7%
50,794
1.8s
Akamai 3.9%
7,352
1.8s
Cloudflare 43%
81,609
1.8s
cdnjs 9%
17,025
1.8s
Netlify Edge 0.5%
1,025
1.9s
Imperva/Incapsula 0.2%
473
1.9s
unpkg 2.9%
5,586
2.1s
Sucuri 0.1%
185
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 26 points behind, leaving 42% of its sites failing. computed
The State of Web Vitals · Q2 2026 · 189,915 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%
802.3s
91137ms
870.03
741.8s
591.2s
Fastly 42.6%
812.3s
91139ms
860.03
761.8s
611.1s
CloudFront 26.7%
802.3s
90145ms
850.04
751.8s
611.1s
Google Cloud CDN 16.2%
842.1s
91144ms
880.03
811.6s
72866ms
Bunny CDN 9.1%
812.2s
93133ms
880.03
751.8s
591.2s
cdnjs 9%
802.3s
93131ms
870.03
741.8s
601.2s
jsDelivr 6.9%
812.2s
92137ms
870.03
751.8s
611.1s
Akamai 3.9%
792.3s
92137ms
860.03
751.8s
561.2s
unpkg 2.9%
742.5s
90144ms
850.04
672.1s
531.3s
Vercel Edge 1.4%
782.4s
85165ms
840.04
761.8s
78729ms
KeyCDN 0.6%
872.0s
91148ms
890.04
841.6s
74842ms
Netlify Edge 0.5%
722.6s
78187ms
740.12
731.9s
531.1s
Imperva/Incapsula 0.2%
772.4s
83170ms
810.08
721.9s
65980ms
Azure CDN 0.2%
822.2s
84154ms
820.08
791.7s
72889ms
Sucuri 0.1%
682.7s
96136ms
830.06
582.3s
361.7s
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 58%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
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Chrome field data from 189,915 sites, representing millions of real page loads · How we measured
Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.