1
At a glance the headline numbers for Scheduling impact
Performance impact by scheduling provider.
1
Providers ranked
After min-sites filter
1,753
Sites in sample
Combined across all items
0.09
Best CLS (p75)
Calendly
The State of Web Vitals · October 2026 · 212,308 crawled sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Calendly | 0.09 | 77.5% | 1,753 |
The State of Web Vitals · October 2026 · 212,308 crawled sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Cal.com 0% 18 0.06
Calendly 0.8% 1,753 0.09
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 · 212,308 crawled sites · 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
Calendly 0.8%
872.0s
9961ms
780.09
831.5s
631.0s
Cal.com 0%
802.5s
10074ms
1000.06
1001.3s
50934ms
Acuity Scheduling 0%
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 · 212,308 crawled sites · desktop field datacorewebvitals.io/state-of-cwv
Related signals Reviews (8) → Customer data platforms (6) → Analytics (20) → Consent platforms (16) → 212,308 crawled sites with Chrome field data, representing millions of real page loads · How we measured
212,308 crawled sites with Chrome field data, representing millions of real page loads. How we measured.