1
At a glance the headline numbers for Maps impact
Performance impact by maps provider.
3
Providers ranked
After min-sites filter
13,184
Sites in sample
Combined across all items
0.02
Best CLS (p75)
Mapbox
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Mapbox | 0.02 | 90.1% | 1,350 | |
| 2 | Google Maps | 0.03 | 85.6% | 8,135 | |
| 3 | Leaflet/OpenStreetMap | 0.04 | 85.4% | 3,699 |
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
HERE Maps 0% 14 0.00
Mapbox 1.4% 1,350 0.02
Google Maps 8.6% 8,135 0.03
Leaflet/OpenStreetMap 3.9% 3,699 0.04
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
90% of Mapbox sites pass CLS. Leaflet/OpenStreetMap trails 5 points behind. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · phone 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 8.6%
722.6s
93125ms
860.03
662.1s
511.4s
Leaflet/OpenStreetMap 3.9%
752.5s
90143ms
850.04
702.0s
551.3s
Mapbox 1.4%
842.1s
97112ms
900.02
801.6s
65981ms
HERE Maps 0%
1001.6s
100111ms
1000.00
1001.4s
89404ms
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.
Mapbox leads on CLS: 90% of its sites pass. Leaflet/OpenStreetMap trails at 85%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals Customer data platforms (5) → Ad networks (9) → Font services (4) → Analytics (20) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.