1
At a glance the headline numbers for Image CDNs impact
Performance impact by image_cdn provider.
3
Providers ranked
After min-sites filter
625
Sites in sample
Combined across all items
0.03
Best CLS (p75)
Cloudinary
The State of Web Vitals · October 2026 · React sites (9,570) · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Cloudinary | 0.03 | 100.0% | 71 | |
| 2 | Akamai Image Manager | 0.17 | 67.8% | 188 | |
| 3 | Bunny Image Optimizer | 0.18 | 64.3% | 366 |
The State of Web Vitals · October 2026 · React sites (9,570) · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Cloudinary 0.7% 71 0.03
Fastly Image Optimizer 0.2% 20 0.05
Akamai Image Manager 2% 188 0.17
Bunny Image Optimizer 3.8% 366 0.18
imgix 0.3% 27 0.15
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site
No provider stands out: pass rates sit between 64% and 68%. computed
The State of Web Vitals · October 2026 · React sites (9,570) · 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
Bunny Image Optimizer 3.8%
732.6s
9881ms
640.18
672.1s
461.7s
Akamai Image Manager 2%
772.4s
9986ms
680.17
731.8s
511.5s
Cloudinary 0.7%
502.8s
10069ms
1000.03
502.1s
251.8s
imgix 0.3%
802.4s
10069ms
200.15
602.0s
601.2s
Fastly Image Optimizer 0.2%
911.7s
10071ms
910.05
82975ms
82653ms
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites
One row per provider, 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.
Akamai Image Manager leads on CLS: 68% of its sites pass. Bunny Image Optimizer trails at 64%. computed
The State of Web Vitals · October 2026 · React sites (9,570) · desktop field datacorewebvitals.io/state-of-cwv
Related signals Search (6) → Font services (4) → Personalization (6) → CDN (16) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured
210,902 crawled sites with Chrome field data, representing millions of real page loads. How we measured.