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
1.5s
Best FCP (p75)
Google Cloud CDN
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by FCP at p75, fastest first
| # | Provider | FCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Google Cloud CDN | 1.5s | 82.6% | 30,748 | |
| 2 | Azure CDN | 1.6s | 80.5% | 394 | |
| 3 | KeyCDN | 1.6s | 82.5% | 1,168 | |
| 4 | jsDelivr | 1.7s | 78.3% | 13,065 | |
| 5 | Vercel Edge | 1.7s | 78.7% | 2,717 | |
| 6 | Fastly | 1.7s | 77.4% | 80,918 | |
| 7 | Akamai | 1.7s | 77.3% | 7,352 | |
| 8 | Bunny CDN | 1.7s | 76.4% | 17,219 | |
| 9 | CloudFront | 1.7s | 76.5% | 50,794 | |
| 10 | cdnjs | 1.8s | 76.0% | 17,025 | |
| 11 | Cloudflare | 1.8s | 75.5% | 81,609 | |
| 12 | Netlify Edge | 1.8s | 75.1% | 1,025 | |
| 13 | Imperva/Incapsula | 1.8s | 74.1% | 473 | |
| 14 | unpkg | 2.0s | 69.2% | 5,586 | |
| 15 | Sucuri | 2.1s | 62.8% | 185 |
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
3
Passing FCP per CDN which group passes the FCP most often
CDNSitesPassing FCPp75
Google Cloud CDN 16.2%
30,748
1.5s
KeyCDN 0.6%
1,168
1.6s
Azure CDN 0.2%
394
1.6s
Vercel Edge 1.4%
2,717
1.7s
jsDelivr 6.9%
13,065
1.7s
Fastly 42.6%
80,918
1.7s
Akamai 3.9%
7,352
1.7s
CloudFront 26.7%
50,794
1.7s
Bunny CDN 9.1%
17,219
1.7s
cdnjs 9%
17,025
1.8s
Cloudflare 43%
81,609
1.8s
Netlify Edge 0.5%
1,025
1.8s
Imperva/Incapsula 0.2%
473
1.8s
unpkg 2.9%
5,586
2.0s
Sucuri 0.1%
185
2.1s
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
83% of Google Cloud CDN sites pass FCP. Sucuri trails 20 points behind, leaving 37% of its sites failing. computed
The State of Web Vitals · Q2 2026 · 189,915 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%
812.2s
95115ms
860.05
761.8s
591.2s
Fastly 42.6%
822.2s
95118ms
850.05
771.7s
611.1s
CloudFront 26.7%
812.2s
94122ms
840.05
771.7s
611.2s
Google Cloud CDN 16.2%
852.1s
94122ms
880.04
831.5s
73849ms
Bunny CDN 9.1%
822.2s
96113ms
860.05
761.7s
591.2s
cdnjs 9%
822.2s
96112ms
850.05
761.8s
601.2s
jsDelivr 6.9%
842.1s
95114ms
860.04
781.7s
621.1s
Akamai 3.9%
812.2s
95117ms
850.05
771.7s
571.2s
unpkg 2.9%
762.5s
93121ms
840.06
692.0s
521.4s
Vercel Edge 1.4%
812.3s
91142ms
850.05
791.7s
80703ms
KeyCDN 0.6%
862.1s
95126ms
860.05
831.6s
70954ms
Netlify Edge 0.5%
762.5s
85160ms
760.10
751.8s
551.1s
Imperva/Incapsula 0.2%
802.3s
92125ms
790.10
741.8s
68952ms
Azure CDN 0.2%
852.1s
92128ms
820.08
811.6s
73862ms
Sucuri 0.1%
722.7s
98107ms
790.09
632.1s
411.6s
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: 83% of its sites pass. Sucuri trails at 63%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
Want the polished comparison? View as a share-anchored page →
Related signals
Marketing pixels (10) →
Bot detection (7) →
Forms (4) →
Personalization (5) →
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.