1
At a glance the headline numbers for Image CDNs impact
Performance impact by image_cdn provider.
1
Providers ranked
After min-sites filter
92
Sites in sample
Combined across all items
0.02
Best CLS (p75)
Bunny Image Optimizer
The State of Web Vitals · October 2026 · Wix sites (5,623) · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Bunny Image Optimizer | 0.02 | 96.0% | 92 |
The State of Web Vitals · October 2026 · Wix sites (5,623) · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Akamai Image Manager 0.3% 18 0.01
Fastly Image Optimizer 0.1% 5 0.02
Bunny Image Optimizer 1.6% 92 0.02
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
The State of Web Vitals · October 2026 · Wix sites (5,623) · 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 1.6%
842.2s
10057ms
960.02
761.4s
521.7s
Akamai Image Manager 0.3%
1001.5s
10046ms
1000.01
1001.1s
501.2s
Fastly Image Optimizer 0.1%
1001.1s
10034ms
1000.02
100589ms
100296ms
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.
The State of Web Vitals · October 2026 · Wix sites (5,623) · desktop field datacorewebvitals.io/state-of-cwv
Related signals Search (6) → Font services (4) → Personalization (6) → CDN (16) → 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.