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
1.1s
Best FCP (p75)
Fastly
The State of Web Vitals · October 2026 · Wix sites (5,623) · phone 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 | 93.3% | 5,622 | |
| 2 | Google Cloud CDN | 1.1s | 93.3% | 5,621 | |
| 3 | CloudFront | 1.1s | 93.3% | 5,617 | |
| 4 | Cloudflare | 1.2s | 89.4% | 1,281 | |
| 5 | Akamai | 1.4s | 88.0% | 51 | |
| 6 | cdnjs | 1.4s | 82.8% | 51 | |
| 7 | Bunny CDN | 1.6s | 79.6% | 92 |
The State of Web Vitals · October 2026 · Wix sites (5,623) · phone field datacorewebvitals.io/state-of-cwv
3
Passing FCP per CDN which group passes the FCP most often
CDNSitesPassing FCPp75
jsDelivr 0.4% 25 975ms
Fastly 100% 5,622 1.1s
Google Cloud CDN 100% 5,621 1.1s
CloudFront 99.9% 5,617 1.1s
Cloudflare 22.8% 1,281 1.2s
Akamai 0.9% 51 1.4s
Vercel Edge 0.7% 38 1.7s
cdnjs 0.9% 51 1.4s
Bunny CDN 1.6% 92 1.6s
KeyCDN 0.1% 6 2.0s
unpkg 0.1% 7 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
No CDN stands out: pass rates sit between 89% and 93%. computed
The State of Web Vitals · October 2026 · Wix sites (5,623) · phone 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%
941.6s
9696ms
970.00
931.1s
86586ms
Google Cloud CDN 100%
941.6s
9696ms
970.00
931.1s
86586ms
CloudFront 99.9%
941.6s
9696ms
970.00
931.1s
86586ms
Cloudflare 22.8%
901.8s
96105ms
970.00
891.2s
83604ms
Bunny CDN 1.6%
852.2s
96100ms
1000.00
801.6s
68932ms
cdnjs 0.9%
792.2s
100139ms
960.01
831.4s
71872ms
Akamai 0.9%
961.7s
87158ms
1000.00
881.4s
74836ms
Vercel Edge 0.7%
922.0s
10094ms
920.01
831.7s
79616ms
jsDelivr 0.4%
1001.7s
10090ms
1000.00
100975ms
88497ms
unpkg 0.1%
333.2s
100185ms
1000.00
332.2s
50833ms
Azure CDN 0.1%
KeyCDN 0.1%
1002.1s
10076ms
1000.00
502.0s
02.0s
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 89%. computed
The State of Web Vitals · October 2026 · Wix sites (5,623) · phone 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.