Cloudflare Rocket Loader vs Jumbo
Head-to-head usage across the sites we track.
Top sites by authority
Cloudflare Rocket Loader · Jumbo · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
15
0
Open Page Rank 8+
214
0
Open Page Rank 7+
926
0
Open Page Rank 6+
1,943
0
Open Page Rank 5+
3,619
0
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Cloudflare Rocket Loader · Jumbo · share of sites in each country using one or the other
United States
30,747
20
India
20,411
9
United Kingdom
15,016
12
Saudi Arabia
14,825
2
Brazil
13,494
7
Germany
12,434
7
Indonesia
11,700
5
Canada
11,691
8
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cloudflare Rocket Loader | Jumbo |
|---|---|---|
| LCP | 2.2 s | 1.8 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 600 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.