Cloudflare Zaraz vs Intersection Observer
Head-to-head usage across the sites we track.
Top sites by authority
Cloudflare Zaraz · Intersection Observer · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
8
2
Open Page Rank 8+
62
20
Open Page Rank 7+
203
59
Open Page Rank 6+
404
89
Open Page Rank 5+
699
141
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Cloudflare Zaraz · Intersection Observer · share of sites in each country using one or the other
United States
5,410
490
Japan
948
3,663
India
2,987
493
United Kingdom
2,385
318
Brazil
2,506
167
Germany
1,977
272
Canada
1,885
213
France
1,668
396
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cloudflare Zaraz | Intersection Observer |
|---|---|---|
| LCP | 2 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 800 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.
All Cloudflare Zaraz sites · All Intersection Observer sites