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
1.4s
Best FCP (p75)
KeyCDN
The State of Web Vitals · Q2 2026 · 189,915 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 | 88.4% | 1,168 | |
| 2 | Vercel Edge | 1.4s | 86.2% | 2,717 | |
| 3 | Google Cloud CDN | 1.4s | 85.6% | 30,748 | |
| 4 | Azure CDN | 1.4s | 85.2% | 394 | |
| 5 | Netlify Edge | 1.5s | 83.6% | 1,025 | |
| 6 | Akamai | 1.5s | 83.6% | 7,352 | |
| 7 | jsDelivr | 1.5s | 82.5% | 13,065 | |
| 8 | Fastly | 1.6s | 81.9% | 80,918 | |
| 9 | Bunny CDN | 1.6s | 81.3% | 17,219 | |
| 10 | CloudFront | 1.6s | 81.3% | 50,794 | |
| 11 | Cloudflare | 1.6s | 81.0% | 81,609 | |
| 12 | cdnjs | 1.6s | 79.8% | 17,025 | |
| 13 | Imperva/Incapsula | 1.7s | 77.6% | 473 | |
| 14 | unpkg | 1.8s | 75.4% | 5,586 | |
| 15 | Sucuri | 2.2s | 64.3% | 185 |
The State of Web Vitals · Q2 2026 · 189,915 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%
1,168
1.4s
Vercel Edge 1.4%
2,717
1.4s
Google Cloud CDN 16.2%
30,748
1.4s
Azure CDN 0.2%
394
1.4s
Akamai 3.9%
7,352
1.5s
Netlify Edge 0.5%
1,025
1.5s
jsDelivr 6.9%
13,065
1.5s
Fastly 42.6%
80,918
1.6s
CloudFront 26.7%
50,794
1.6s
Bunny CDN 9.1%
17,219
1.6s
Cloudflare 43%
81,609
1.6s
cdnjs 9%
17,025
1.6s
Imperva/Incapsula 0.2%
473
1.7s
unpkg 2.9%
5,586
1.8s
Sucuri 0.1%
185
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 · Q2 2026 · 189,915 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%
852.1s
9970ms
770.10
811.6s
611.1s
Fastly 42.6%
852.0s
9972ms
760.10
821.6s
621.1s
CloudFront 26.7%
842.1s
9876ms
750.10
811.6s
621.1s
Google Cloud CDN 16.2%
872.0s
9878ms
780.09
861.4s
72882ms
Bunny CDN 9.1%
862.0s
9970ms
760.10
811.6s
621.1s
cdnjs 9%
842.1s
9967ms
750.10
801.6s
611.2s
jsDelivr 6.9%
872.0s
9969ms
770.10
831.5s
641.1s
Akamai 3.9%
872.0s
9969ms
780.09
841.5s
621.1s
unpkg 2.9%
802.2s
9972ms
740.11
751.8s
561.3s
Vercel Edge 1.4%
872.0s
9889ms
770.09
861.4s
79657ms
KeyCDN 0.6%
901.9s
9984ms
770.10
881.4s
75794ms
Netlify Edge 0.5%
812.3s
9391ms
770.10
841.5s
70987ms
Imperva/Incapsula 0.2%
802.3s
9781ms
700.13
781.7s
66942ms
Azure CDN 0.2%
842.1s
10078ms
760.10
851.4s
73840ms
Sucuri 0.1%
702.7s
10060ms
640.18
642.2s
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.
KeyCDN leads on FCP: 88% of its sites pass. Sucuri trails at 64%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop 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.