Cart Functionality vs Scalefast
Head-to-head usage across the sites we track.
Top sites by authority
Cart Functionality · Scalefast · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
138
0
Open Page Rank 8+
2,470
0
Open Page Rank 7+
10,314
2
Open Page Rank 6+
20,555
2
Open Page Rank 5+
37,358
2
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 · Scalefast · share of sites in each country using one or the other
United States
819,640
15
United Kingdom
265,245
15
India
226,526
15
Germany
217,355
14
France
207,855
16
Canada
188,032
16
Brazil
158,050
14
Italy
154,275
14
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cart Functionality | Scalefast |
|---|---|---|
| LCP | 1.7 s | 1.9 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 850 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.