mod_dav vs Shelf
Head-to-head usage across the sites we track.
Top sites by authority
mod_dav · Shelf · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 8+
28
1
Open Page Rank 7+
72
1
Open Page Rank 6+
107
1
Open Page Rank 5+
139
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
mod_dav · Shelf · share of sites in each country using one or the other
South Korea
1,151
6
United States
1,018
13
Japan
885
5
United Kingdom
456
170
India
575
5
Indonesia
529
4
Germany
522
7
Spain
424
3
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | mod_dav | Shelf |
|---|---|---|
| LCP | 1.3 s | 1.2 s |
| INP | 50 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 300 ms |
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.