Push notifications impact React sites
Performance impact by push_notifications provider.
1
At a glance the headline numbers for Push notifications impact
Performance impact by push_notifications provider.
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Items
No data this edition
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Sample
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Best CLS
The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv
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The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites |
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No data above the minimum sample threshold this edition.
The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Firebase Cloud Messaging 0.1% 13 0.05
OneSignal 0.1% 11 0.01
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 · React sites (9,570) · 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
Firebase Cloud Messaging 0.1%
334.4s
78172ms
1000.05
334.2s
223.7s
OneSignal 0.1%
672.5s
86136ms
1000.01
562.0s
331.6s
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 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv
Related signals E-commerce (17) → A/B testing (12) → Video (7) → Maps (4) → 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.