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
657ms
Best TTFB (p75)
Vercel Edge
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by TTFB at p75, fastest first
| # | Provider | TTFB p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Vercel Edge | 657ms | 78.8% | 2,717 | |
| 2 | KeyCDN | 794ms | 75.2% | 1,168 | |
| 3 | Azure CDN | 840ms | 73.2% | 394 | |
| 4 | Google Cloud CDN | 882ms | 71.8% | 30,748 | |
| 5 | Imperva/Incapsula | 942ms | 66.1% | 473 | |
| 6 | Netlify Edge | 987ms | 69.9% | 1,025 | |
| 7 | jsDelivr | 1.1s | 63.9% | 13,065 | |
| 8 | Akamai | 1.1s | 62.2% | 7,352 | |
| 9 | Fastly | 1.1s | 62.4% | 80,918 | |
| 10 | CloudFront | 1.1s | 61.7% | 50,794 | |
| 11 | Bunny CDN | 1.1s | 61.6% | 17,219 | |
| 12 | Cloudflare | 1.1s | 60.9% | 81,609 | |
| 13 | cdnjs | 1.2s | 60.5% | 17,025 | |
| 14 | unpkg | 1.3s | 56.4% | 5,586 | |
| 15 | Sucuri | 1.7s | 39.6% | 185 |
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing TTFB per CDN which group passes the TTFB most often
CDNSitesPassing TTFBp75
Vercel Edge 1.4%
2,717
657ms
KeyCDN 0.6%
1,168
794ms
Azure CDN 0.2%
394
840ms
Google Cloud CDN 16.2%
30,748
882ms
Netlify Edge 0.5%
1,025
987ms
Imperva/Incapsula 0.2%
473
942ms
jsDelivr 6.9%
13,065
1.1s
Fastly 42.6%
80,918
1.1s
Akamai 3.9%
7,352
1.1s
CloudFront 26.7%
50,794
1.1s
Bunny CDN 9.1%
17,219
1.1s
Cloudflare 43%
81,609
1.1s
cdnjs 9%
17,025
1.2s
unpkg 2.9%
5,586
1.3s
Sucuri 0.1%
185
1.7s
Good
Needs Improvement
Poor
Sorted best-passing first · median colored by its own rating · pass = good TTFB (800ms at p75) · one value per site
79% of Vercel Edge sites pass TTFB. Sucuri trails 39 points behind, leaving 60% 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.
Vercel Edge leads on TTFB: 79% of its sites pass. Sucuri trails at 40%. 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.