Cloudflare Rocket Loader vs Cloudflare Zaraz

Head-to-head usage across the sites we track.

Top sites by authority

Cloudflare Rocket Loader · Cloudflare Zaraz · 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 · Cloudflare Zaraz · share of sites in each country using one or the other

United States 35,506

5,819

India 23,560

3,208

United Kingdom 17,454

2,628

Saudi Arabia 17,113

883

Brazil 15,129

2,676

Germany 14,506

2,202

France 14,025

1,985

Indonesia 14,015

1,852

Audience countries from the Chrome UX Report, top markets of either technology.

Real user performance

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.

All Cloudflare Rocket Loader sites · All Cloudflare Zaraz sites