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+
195
0
Open Page Rank 7+
877
0
Open Page Rank 6+
1,843
0
Open Page Rank 5+
3,446
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
29,959
22
India
19,958
8
Saudi Arabia
15,432
2
United Kingdom
14,634
10
Brazil
13,122
7
Germany
11,955
4
Canada
11,512
7
Indonesia
11,371
4
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cloudflare Rocket Loader | Jumbo |
|---|---|---|
| LCP | 2.1 s | 1.9 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 600 ms |
Median site's p75 values from the Chrome UX Report, Sep 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.