CodeMirror vs iWeb
Head-to-head usage across the sites we track.
Top sites by authority
CodeMirror · iWeb · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
28
1
Open Page Rank 8+
236
1
Open Page Rank 7+
554
3
Open Page Rank 6+
848
3
Open Page Rank 5+
1,231
3
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
CodeMirror · iWeb · share of sites in each country using one or the other
United States
11,605
59
India
2,977
23
United Kingdom
2,501
26
Canada
2,325
22
Germany
1,980
33
Brazil
1,954
17
France
1,686
26
Spain
1,646
25
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | CodeMirror | iWeb |
|---|---|---|
| LCP | 2.1 s | 1.3 s |
| INP | 75 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 500 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.