1
At a glance the headline numbers for Maps impact
Performance impact by maps provider.
2
Providers ranked
After min-sites filter
797
Sites in sample
Combined across all items
0.15
Best CLS (p75)
Leaflet/OpenStreetMap
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 | Leaflet/OpenStreetMap | 0.15 | 66.4% | 339 | |
| 2 | Google Maps | 0.18 | 69.1% | 458 |
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
Mapbox 0.4% 40 0.10
Google Maps 4.8% 458 0.18
Leaflet/OpenStreetMap 3.5% 339 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 66% and 69%. 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
Google Maps 4.8%
583.2s
10078ms
690.18
512.7s
312.5s
Leaflet/OpenStreetMap 3.5%
643.0s
10068ms
660.15
542.5s
322.0s
Mapbox 0.4%
623.1s
10073ms
770.10
542.7s
251.9s
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.
Google Maps leads on CLS: 69% of its sites pass. Leaflet/OpenStreetMap trails at 66%. computed
The State of Web Vitals · October 2026 · React sites (9,570) · desktop field datacorewebvitals.io/state-of-cwv
Related signals Customer data platforms (6) → Ad networks (9) → Font services (4) → Analytics (20) → 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.