Push notifications impact
Performance impact by push_notifications provider.
1
At a glance the headline numbers for Push notifications impact
Performance impact by push_notifications provider.
3
Providers ranked
After min-sites filter
603
Sites in sample
Combined across all items
0.11
Best CLS (p75)
OneSignal
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | OneSignal | 0.11 | 72.9% | 341 | |
| 2 | Firebase Cloud Messaging | 0.16 | 65.5% | 207 | |
| 3 | Airship | 0.22 | 55.3% | 55 |
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
PushEngage 0% 20 0.03
Pushwoosh 0% 8 0.09
OneSignal 0.2% 341 0.11
Firebase Cloud Messaging 0.1% 207 0.16
Airship 0% 55 0.22
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
73% of OneSignal sites pass CLS. Firebase Cloud Messaging trails 7 points behind, leaving 34% of its sites failing. computed
The State of Web Vitals · Q2 2026 · 189,915 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
PushEngage 0%
752.1s
69215ms
880.03
692.0s
201.9s
Pushwoosh 0%
712.8s
86194ms
860.09
712.4s
571.8s
OneSignal 0.2%
702.8s
83177ms
730.11
592.3s
531.3s
Airship 0%
762.3s
97161ms
550.22
741.9s
511.1s
Firebase Cloud Messaging 0.1%
643.2s
89155ms
660.16
741.9s
661.0s
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.
OneSignal leads on CLS: 73% of its sites pass. Firebase Cloud Messaging trails at 66%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
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Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.