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 29,959

5,499

India 19,958

2,982

United Kingdom 14,634

2,366

Saudi Arabia 15,432

761

Brazil 13,122

2,534

Germany 11,955

1,946

Canada 11,512

1,908

Indonesia 11,371

1,588

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, 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.

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