CDN impact Wix sites
Time to first byte by CDN provider, measured in real-user Chrome data.
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At a glance the headline numbers for CDN impact
Time to first byte by CDN provider, measured in real-user Chrome data.
7
Providers ranked
After min-sites filter
18,335
Sites in sample
Combined across all items
1.1s
Best FCP (p75)
Fastly
The State of Web Vitals · October 2026 · Wix sites (5,623) · all devices field datacorewebvitals.io/state-of-cwv
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The ranking sorted by FCP at p75, fastest first
| # | Provider | FCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Fastly | 1.1s | 92.9% | 5,622 | |
| 2 | Google Cloud CDN | 1.1s | 93.0% | 5,621 | |
| 3 | CloudFront | 1.1s | 93.0% | 5,617 | |
| 4 | Cloudflare | 1.3s | 87.9% | 1,281 | |
| 5 | Akamai | 1.4s | 87.5% | 51 | |
| 6 | cdnjs | 1.5s | 85.7% | 51 | |
| 7 | Bunny CDN | 1.8s | 76.9% | 92 |
The State of Web Vitals · October 2026 · Wix sites (5,623) · all devices field datacorewebvitals.io/state-of-cwv
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Passing FCP per CDN which group passes the FCP most often
CDNSitesPassing FCPp75
jsDelivr 0.4% 25 973ms
Azure CDN 0.1% 6 1.5s
Google Cloud CDN 100% 5,621 1.1s
CloudFront 99.9% 5,617 1.1s
Fastly 100% 5,622 1.1s
Cloudflare 22.8% 1,281 1.3s
Akamai 0.9% 51 1.4s
cdnjs 0.9% 51 1.5s
Vercel Edge 0.7% 38 1.7s
Bunny CDN 1.6% 92 1.8s
unpkg 0.1% 7 2.1s
KeyCDN 0.1% 6 2.6s
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
93% of Google Cloud CDN sites pass FCP. Cloudflare trails 5 points behind. computed
The State of Web Vitals · October 2026 · Wix sites (5,623) · all devices field datacorewebvitals.io/state-of-cwv
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All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75
LCP
INP
CLS
FCP
TTFB
Fastly 100%
941.6s
9788ms
980.00
931.1s
81658ms
Google Cloud CDN 100%
941.6s
9788ms
980.00
931.1s
81658ms
CloudFront 99.9%
941.6s
9788ms
980.00
931.1s
81658ms
Cloudflare 22.8%
901.8s
9796ms
970.01
881.3s
76765ms
Bunny CDN 1.6%
802.3s
9595ms
1000.01
771.8s
601.4s
cdnjs 0.9%
862.0s
94110ms
940.01
861.5s
71847ms
Akamai 0.9%
981.8s
94130ms
1000.00
881.4s
631.4s
Vercel Edge 0.7%
842.1s
10090ms
920.01
811.7s
72856ms
jsDelivr 0.4%
1001.6s
10092ms
960.01
100973ms
91471ms
unpkg 0.1%
572.7s
100147ms
1000.01
572.1s
67936ms
Azure CDN 0.1%
1001.9s
10069ms
1000.01
1001.5s
20960ms
KeyCDN 0.1%
672.9s
10076ms
1000.01
332.6s
332.4s
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.
Fastly leads on FCP: 93% of its sites pass. Cloudflare trails at 88%. computed
The State of Web Vitals · October 2026 · Wix sites (5,623) · all devices field datacorewebvitals.io/state-of-cwv
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Related signals Marketing pixels (10) → Bot detection (8) → Forms (4) → Personalization (6) → 203,892 crawled sites with Chrome field data, representing millions of real page loads · How we measured
203,892 crawled sites with Chrome field data, representing millions of real page loads. How we measured.