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+
138
2
Open Page Rank 8+
2,470
2
Open Page Rank 7+
10,314
3
Open Page Rank 6+
20,555
6
Open Page Rank 5+
37,358
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
819,640
44
United Kingdom
265,245
22
India
226,526
32
Germany
217,355
21
France
207,855
78
Canada
188,032
34
Brazil
158,050
14
Italy
154,275
24
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, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.