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+
6
1
Open Page Rank 8+
58
20
Open Page Rank 7+
199
60
Open Page Rank 6+
398
91
Open Page Rank 5+
688
165
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
5,819
580
Japan
1,114
4,165
India
3,208
566
United Kingdom
2,628
352
Brazil
2,676
176
Germany
2,202
298
France
1,985
448
Canada
2,069
252
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cloudflare Zaraz | Intersection Observer |
|---|---|---|
| LCP | 2.1 s | 2 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 900 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.
All Cloudflare Zaraz sites · All Intersection Observer sites