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+
34
1
Open Page Rank 7+
84
1
Open Page Rank 6+
130
1
Open Page Rank 5+
171
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
1,383
6
United States
1,157
12
Japan
1,059
6
United Kingdom
507
180
India
646
6
Germany
646
5
Indonesia
620
4
France
512
4
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, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.