Booster Page Speed Optimizer vs Carro
Head-to-head usage across the sites we track.
Top sites by authority
Booster Page Speed Optimizer · Carro · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
2
0
Open Page Rank 8+
7
0
Open Page Rank 7+
11
0
Open Page Rank 6+
22
0
Open Page Rank 5+
37
0
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Booster Page Speed Optimizer · Carro · share of sites in each country using one or the other
United States
2,898
222
India
1,454
61
United Kingdom
1,178
79
Canada
849
83
Germany
869
42
France
771
39
Australia
753
45
Italy
702
25
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Booster Page Speed Optimizer | Carro |
|---|---|---|
| LCP | 1.8 s | 1.8 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 500 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.