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
0.07
Best CLS (p75)
Akamai Image Manager
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Akamai Image Manager | 0.07 | 81.0% | 188 | |
| 2 | Bunny Image Optimizer | 0.09 | 81.4% | 366 | |
| 3 | Cloudinary | 0.33 | 15.9% | 71 |
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Fastly Image Optimizer 0.2% 20 0.05
imgix 0.3% 27 0.01
Bunny Image Optimizer 3.8% 366 0.09
Akamai Image Manager 2% 188 0.07
Cloudinary 0.7% 71 0.33
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 81% and 81%. computed
The State of Web Vitals · October 2026 · React sites (9,570) · 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
Bunny Image Optimizer 3.8%
682.8s
93121ms
810.09
622.2s
431.7s
Akamai Image Manager 2%
722.6s
91135ms
810.07
652.0s
441.5s
Cloudinary 0.7%
782.4s
11737ms
160.33
871.5s
61.2s
imgix 0.3%
861.9s
94126ms
910.01
861.3s
55944ms
Fastly Image Optimizer 0.2%
792.1s
100122ms
950.05
741.8s
681.2s
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.
Bunny Image Optimizer leads on CLS: 81% of its sites pass. Akamai Image Manager trails at 81%. computed
The State of Web Vitals · October 2026 · React sites (9,570) · all devices 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.