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
586ms
Best TTFB (p75)
Google Cloud CDN
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 TTFB at p75, fastest first
| # | Provider | TTFB p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Google Cloud CDN | 586ms | 85.7% | 5,621 | |
| 2 | CloudFront | 586ms | 85.7% | 5,617 | |
| 3 | Fastly | 586ms | 85.7% | 5,622 | |
| 4 | Cloudflare | 604ms | 82.6% | 1,281 | |
| 5 | Akamai | 836ms | 73.9% | 51 | |
| 6 | cdnjs | 872ms | 71.4% | 51 | |
| 7 | Bunny CDN | 932ms | 67.9% | 92 |
The State of Web Vitals · October 2026 · Wix sites (5,623) · phone field datacorewebvitals.io/state-of-cwv
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Passing TTFB per CDN which group passes the TTFB most often
CDNSitesPassing TTFBp75
jsDelivr 0.4% 25 497ms
Fastly 100% 5,622 586ms
Google Cloud CDN 100% 5,621 586ms
CloudFront 99.9% 5,617 586ms
Cloudflare 22.8% 1,281 604ms
Vercel Edge 0.7% 38 616ms
Akamai 0.9% 51 836ms
cdnjs 0.9% 51 872ms
Bunny CDN 1.6% 92 932ms
unpkg 0.1% 7 833ms
KeyCDN 0.1% 6 2.0s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good TTFB (800ms at p75) · one value per site
No CDN stands out: pass rates sit between 83% and 86%. computed
The State of Web Vitals · October 2026 · Wix sites (5,623) · phone 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
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 TTFB: 86% of its sites pass. Cloudflare trails at 83%. 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.