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 30,747

5,410

India 20,411

2,987

United Kingdom 15,016

2,385

Brazil 13,494

2,506

Saudi Arabia 14,825

761

Germany 12,434

1,977

Canada 11,691

1,885

Indonesia 11,700

1,599

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, 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.

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