Cart Functionality vs Nacelle
Head-to-head usage across the sites we track.
Top sites by authority
Cart Functionality · Nacelle · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
146
3
Open Page Rank 8+
2,468
3
Open Page Rank 7+
10,226
3
Open Page Rank 6+
20,356
6
Open Page Rank 5+
37,111
9
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Cart Functionality · Nacelle · share of sites in each country using one or the other
United States
737,680
47
United Kingdom
239,464
21
India
207,201
29
Germany
196,505
17
France
181,709
62
Canada
166,395
29
Brazil
145,168
14
Italy
138,310
20
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cart Functionality | Nacelle |
|---|---|---|
| LCP | 1.7 s | 2.1 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 1000 ms |
Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.