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 · All devices 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
703ms
Best TTFB (p75)
Vercel Edge
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by TTFB at p75, fastest first

# Provider TTFB p75 Passing Sites
1 Vercel Edge 703ms 79.5%
2,717
2 Google Cloud CDN 849ms 73.0%
30,748
3 Azure CDN 862ms 73.2%
394
4 Imperva/Incapsula 952ms 67.8%
473
5 KeyCDN 954ms 69.6%
1,168
6 jsDelivr 1.1s 61.8%
13,065
7 Netlify Edge 1.1s 54.7%
1,025
8 Fastly 1.1s 61.3%
80,918
9 CloudFront 1.2s 60.5%
50,794
10 Akamai 1.2s 56.8%
7,352
11 cdnjs 1.2s 59.9%
17,025
12 Bunny CDN 1.2s 59.2%
17,219
13 Cloudflare 1.2s 58.9%
81,609
14 unpkg 1.4s 52.2%
5,586
15 Sucuri 1.6s 41.4%
185
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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 80% 703ms
Azure CDN 0.2% 394 73% 862ms
Google Cloud CDN 16.2% 30,748 73% 849ms
KeyCDN 0.6% 1,168 70% 954ms
Imperva/Incapsula 0.2% 473 68% 952ms
jsDelivr 6.9% 13,065 62% 1.1s
Fastly 42.6% 80,918 61% 1.1s
CloudFront 26.7% 50,794 61% 1.2s
cdnjs 9% 17,025 60% 1.2s
Bunny CDN 9.1% 17,219 59% 1.2s
Cloudflare 43% 81,609 59% 1.2s
Akamai 3.9% 7,352 57% 1.2s
Netlify Edge 0.5% 1,025 55% 1.1s
unpkg 2.9% 5,586 52% 1.4s
Sucuri 0.1% 185 41% 1.6s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good TTFB (800ms at p75) · one value per site

80% of Vercel Edge sites pass TTFB. Sucuri trails 39 points behind, leaving 59% of its sites failing. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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%
812.2s
95115ms
860.05
761.8s
591.2s
Fastly 42.6%
822.2s
95118ms
850.05
771.7s
611.1s
CloudFront 26.7%
812.2s
94122ms
840.05
771.7s
611.2s
Google Cloud CDN 16.2%
852.1s
94122ms
880.04
831.5s
73849ms
Bunny CDN 9.1%
822.2s
96113ms
860.05
761.7s
591.2s
cdnjs 9%
822.2s
96112ms
850.05
761.8s
601.2s
jsDelivr 6.9%
842.1s
95114ms
860.04
781.7s
621.1s
Akamai 3.9%
812.2s
95117ms
850.05
771.7s
571.2s
unpkg 2.9%
762.5s
93121ms
840.06
692.0s
521.4s
Vercel Edge 1.4%
812.3s
91142ms
850.05
791.7s
80703ms
KeyCDN 0.6%
862.1s
95126ms
860.05
831.6s
70954ms
Netlify Edge 0.5%
762.5s
85160ms
760.10
751.8s
551.1s
Imperva/Incapsula 0.2%
802.3s
92125ms
790.10
741.8s
68952ms
Azure CDN 0.2%
852.1s
92128ms
820.08
811.6s
73862ms
Sucuri 0.1%
722.7s
98107ms
790.09
632.1s
411.6s
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: 80% of its sites pass. Sucuri trails at 41%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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