The State of Web Vitals

CDN impact

Time to first byte by CDN provider, measured in real-user Chrome data.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Phone field outcomes
Metric TTFB LCP FCP
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
729ms
Best TTFB (p75)
Vercel Edge
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by TTFB at p75, fastest first

# Provider TTFB p75 Passing Sites
1 Vercel Edge 729ms 77.9%
2,717
2 KeyCDN 842ms 73.5%
1,168
3 Google Cloud CDN 866ms 72.1%
30,748
4 Azure CDN 889ms 72.3%
394
5 Imperva/Incapsula 980ms 64.6%
473
6 Fastly 1.1s 61.1%
80,918
7 jsDelivr 1.1s 60.5%
13,065
8 CloudFront 1.1s 60.5%
50,794
9 Netlify Edge 1.1s 52.8%
1,025
10 Bunny CDN 1.2s 59.1%
17,219
11 Cloudflare 1.2s 59.2%
81,609
12 Akamai 1.2s 55.6%
7,352
13 cdnjs 1.2s 59.5%
17,025
14 unpkg 1.3s 52.7%
5,586
15 Sucuri 1.7s 36.0%
185
The State of Web Vitals · Q2 2026 · 189,915 sites · phone 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 78% 729ms
KeyCDN 0.6% 1,168 74% 842ms
Azure CDN 0.2% 394 72% 889ms
Google Cloud CDN 16.2% 30,748 72% 866ms
Imperva/Incapsula 0.2% 473 65% 980ms
Fastly 42.6% 80,918 61% 1.1s
CloudFront 26.7% 50,794 61% 1.1s
jsDelivr 6.9% 13,065 61% 1.1s
cdnjs 9% 17,025 60% 1.2s
Cloudflare 43% 81,609 59% 1.2s
Bunny CDN 9.1% 17,219 59% 1.2s
Akamai 3.9% 7,352 56% 1.2s
Netlify Edge 0.5% 1,025 53% 1.1s
unpkg 2.9% 5,586 53% 1.3s
Sucuri 0.1% 185 36% 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

78% of Vercel Edge sites pass TTFB. Sucuri trails 42 points behind, leaving 64% of its sites failing. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · 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
Cloudflare 43%
802.3s
91137ms
870.03
741.8s
591.2s
Fastly 42.6%
812.3s
91139ms
860.03
761.8s
611.1s
CloudFront 26.7%
802.3s
90145ms
850.04
751.8s
611.1s
Google Cloud CDN 16.2%
842.1s
91144ms
880.03
811.6s
72866ms
Bunny CDN 9.1%
812.2s
93133ms
880.03
751.8s
591.2s
cdnjs 9%
802.3s
93131ms
870.03
741.8s
601.2s
jsDelivr 6.9%
812.2s
92137ms
870.03
751.8s
611.1s
Akamai 3.9%
792.3s
92137ms
860.03
751.8s
561.2s
unpkg 2.9%
742.5s
90144ms
850.04
672.1s
531.3s
Vercel Edge 1.4%
782.4s
85165ms
840.04
761.8s
78729ms
KeyCDN 0.6%
872.0s
91148ms
890.04
841.6s
74842ms
Netlify Edge 0.5%
722.6s
78187ms
740.12
731.9s
531.1s
Imperva/Incapsula 0.2%
772.4s
83170ms
810.08
721.9s
65980ms
Azure CDN 0.2%
822.2s
84154ms
820.08
791.7s
72889ms
Sucuri 0.1%
682.7s
96136ms
830.06
582.3s
361.7s
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: 78% of its sites pass. Sucuri trails at 36%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
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Related signals Marketing pixels (10) → Bot detection (7) → Forms (4) → Personalization (5) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured