Engintron vs Shelf
Head-to-head usage across the sites we track.
Top sites by authority
Engintron · Shelf · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 8+
9
1
Open Page Rank 7+
22
1
Open Page Rank 6+
39
1
Open Page Rank 5+
66
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Engintron · Shelf · share of sites in each country using one or the other
Bosnia & Herzegovina
1,391
0
Croatia
1,355
2
India
1,224
5
United States
1,042
13
Israel
974
2
Uzbekistan
752
1
Brazil
651
7
Serbia
584
1
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Engintron | Shelf |
|---|---|---|
| LCP | 2.2 s | 1.2 s |
| INP | 75 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 1200 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.