Day.js vs Swiper

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

Top sites by authority

Day.js · Swiper · 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

Day.js · Swiper · share of sites in each country using one or the other

United States 14,792

427,105

India 5,710

239,537

Brazil 3,856

225,038

Germany 4,547

188,085

Japan 9,068

180,131

United Kingdom 4,861

161,180

France 3,955

159,069

Italy 3,096

145,736

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 Day.js sites · All Swiper sites