CDN impact Wix sites
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.
7
Providers ranked
After min-sites filter
18,335
Sites in sample
Combined across all items
745ms
Best TTFB (p75)
Akamai
The State of Web Vitals · October 2026 · Wix sites (5,623) · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by TTFB at p75, fastest first
| # | Provider | TTFB p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Akamai | 745ms | 75.0% | 51 | |
| 2 | Fastly | 932ms | 71.8% | 5,622 | |
| 3 | Google Cloud CDN | 932ms | 71.8% | 5,621 | |
| 4 | CloudFront | 932ms | 71.8% | 5,617 | |
| 5 | Cloudflare | 1.3s | 64.3% | 1,281 | |
| 6 | cdnjs | 1.3s | 70.0% | 51 | |
| 7 | Bunny CDN | 1.7s | 52.4% | 92 |
The State of Web Vitals · October 2026 · Wix sites (5,623) · desktop field datacorewebvitals.io/state-of-cwv
3
Passing TTFB per CDN which group passes the TTFB most often
CDNSitesPassing TTFBp75
jsDelivr 0.4% 25 682ms
Akamai 0.9% 51 745ms
Vercel Edge 0.7% 38 574ms
Fastly 100% 5,622 932ms
Google Cloud CDN 100% 5,621 932ms
CloudFront 99.9% 5,617 932ms
cdnjs 0.9% 51 1.3s
Cloudflare 22.8% 1,281 1.3s
Bunny CDN 1.6% 92 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
72% of Fastly sites pass TTFB. Cloudflare trails 8 points behind, leaving 36% of its sites failing. computed
The State of Web Vitals · October 2026 · Wix sites (5,623) · 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
Fastly 100%
921.6s
10048ms
960.02
93814ms
72932ms
Google Cloud CDN 100%
921.6s
10048ms
960.02
93814ms
72932ms
CloudFront 99.9%
921.6s
10048ms
960.02
93814ms
72932ms
Cloudflare 22.8%
881.9s
10060ms
940.02
881.0s
641.3s
Bunny CDN 1.6%
842.2s
10057ms
960.02
761.4s
521.7s
cdnjs 0.9%
642.8s
10070ms
820.07
821.4s
701.3s
Akamai 0.9%
1001.3s
10041ms
1000.02
100823ms
75745ms
Vercel Edge 0.7%
901.8s
10047ms
900.02
901.4s
75574ms
jsDelivr 0.4%
1001.5s
10052ms
1000.02
83842ms
80682ms
unpkg 0.1%
04.1s
1000.01
02.7s
Azure CDN 0.1%
KeyCDN 0.1%
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 TTFB: 72% of its sites pass. Cloudflare trails at 64%. computed
The State of Web Vitals · October 2026 · Wix sites (5,623) · desktop field datacorewebvitals.io/state-of-cwv
Want the polished comparison? View as a share-anchored page →
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.