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
162,178
Sites in sample
Combined across all items
1.9s
Best LCP (p75)
KeyCDN
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | KeyCDN | 1.9s | 90.5% | 620 | |
| 2 | Google Cloud CDN | 1.9s | 87.1% | 16,124 | |
| 3 | jsDelivr | 2.0s | 86.9% | 6,936 | |
| 4 | Akamai | 2.0s | 86.8% | 3,939 | |
| 5 | Bunny CDN | 2.0s | 85.8% | 9,060 | |
| 6 | Vercel Edge | 2.0s | 87.1% | 1,458 | |
| 7 | Fastly | 2.0s | 85.3% | 42,269 | |
| 8 | Cloudflare | 2.0s | 85.3% | 42,570 | |
| 9 | Azure CDN | 2.1s | 83.8% | 197 | |
| 10 | cdnjs | 2.1s | 84.5% | 8,930 | |
| 11 | CloudFront | 2.1s | 84.7% | 26,296 | |
| 12 | unpkg | 2.3s | 80.1% | 2,887 | |
| 13 | Netlify Edge | 2.3s | 81.4% | 548 | |
| 14 | Sucuri | 2.5s | 73.8% | 102 | |
| 15 | Imperva/Incapsula | 2.5s | 74.4% | 242 |
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing LCP per CDN which group passes the LCP most often
CDNSitesPassing LCPp75
KeyCDN 0.7% 620 1.9s
Google Cloud CDN 17% 16,124 1.9s
Vercel Edge 1.5% 1,458 2.0s
jsDelivr 7.3% 6,936 2.0s
Akamai 4.2% 3,939 2.0s
Bunny CDN 9.5% 9,060 2.0s
Cloudflare 44.9% 42,570 2.0s
Fastly 44.5% 42,269 2.0s
CloudFront 27.7% 26,296 2.1s
cdnjs 9.4% 8,930 2.1s
Azure CDN 0.2% 197 2.1s
Netlify Edge 0.6% 548 2.3s
unpkg 3% 2,887 2.3s
Imperva/Incapsula 0.3% 242 2.5s
Sucuri 0.1% 102 2.5s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site
91% of KeyCDN sites pass LCP. Sucuri trails 17 points behind, leaving 26% of its sites failing. computed
The State of Web Vitals · Q1 2026 · 94,910 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 44.9%
852.0s
9970ms
770.10
811.6s
611.1s
Fastly 44.5%
852.0s
9972ms
760.10
821.6s
631.1s
CloudFront 27.7%
852.1s
9876ms
760.10
821.6s
621.1s
Google Cloud CDN 17%
871.9s
9878ms
780.09
861.4s
72875ms
Bunny CDN 9.5%
862.0s
9969ms
770.10
821.5s
621.1s
cdnjs 9.4%
852.1s
9966ms
760.10
801.6s
611.1s
jsDelivr 7.3%
872.0s
9968ms
770.10
821.5s
641.1s
Akamai 4.2%
872.0s
9968ms
780.09
831.5s
621.1s
unpkg 3%
802.3s
9970ms
750.11
761.8s
571.3s
Vercel Edge 1.5%
872.0s
9889ms
760.10
871.4s
80645ms
KeyCDN 0.7%
911.9s
9981ms
770.10
901.4s
76784ms
Netlify Edge 0.6%
812.3s
9389ms
790.09
841.5s
671.0s
Imperva/Incapsula 0.3%
742.5s
9687ms
660.17
771.7s
64990ms
Azure CDN 0.2%
842.1s
10079ms
760.10
851.4s
74813ms
Sucuri 0.1%
742.5s
10057ms
610.18
702.0s
391.7s
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 LCP: 91% of its sites pass. Sucuri trails at 74%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · desktop field datacorewebvitals.io/state-of-cwv
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Related signals Marketing pixels (10) → Bot detection (7) → Forms (3) → Personalization (5) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.