Lazy.js vs RequireJS
Head-to-head usage across the sites we track.
Detections for Lazy.js end in May 2020. The fingerprint catalog behind our crawls no longer carries that technology as its own entry, usually because it was retired or split into more specific ones, so its figure is the last recorded and is not directly comparable with a currently tracked technology.
Top sites by authority
Lazy.js · RequireJS · 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
Lazy.js · RequireJS · share of sites in each country using one or the other
United States
976
132,201
United Kingdom
613
40,149
Germany
612
38,420
India
554
30,963
Canada
534
29,177
France
467
27,073
Brazil
399
26,685
Australia
349
19,263
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Lazy.js | RequireJS |
|---|---|---|
| LCP | 2 s | 1.5 s |
| INP | 100 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 600 ms |
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.