Cloudflare Rocket Loader vs Intersection Observer
Head-to-head usage across the sites we track.
Top sites by authority
Cloudflare Rocket Loader · Intersection Observer · how many of each technology's sites sit in the web's highest authority tiers
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 · Intersection Observer · share of sites in each country using one or the other
United States
35,506
580
India
23,560
566
United Kingdom
17,454
352
Saudi Arabia
17,113
99
Brazil
15,129
176
Germany
14,506
298
France
14,025
448
Indonesia
14,015
312
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cloudflare Rocket Loader | Intersection Observer |
|---|---|---|
| LCP | 2.2 s | 2 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 900 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Intersection Observer to Cloudflare Rocket Loader
| Domain | When |
|---|---|
| thehamperemporium.com.au | Jul 2025 |
| montfortcollege.edu.in | Jul 2025 |
| giftsaustralia.com.au | Jul 2025 |
All Cloudflare Rocket Loader sites · All Intersection Observer sites