Fast Bundle vs Vitals

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

Top sites by authority

Fast Bundle · Vitals · 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

Fast Bundle · Vitals · share of sites in each country using one or the other

United States 2,894

3,310

United Kingdom 1,313

1,382

India 1,045

1,273

Germany 1,027

992

Canada 928

993

Australia 896

956

France 732

905

Italy 578

674

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 Fast Bundle sites · All Vitals sites