IIS vs RoadRunner
Head-to-head usage across the sites we track.
Top sites by authority
IIS · RoadRunner · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
50
0
Open Page Rank 8+
1,251
1
Open Page Rank 7+
4,874
1
Open Page Rank 6+
9,276
1
Open Page Rank 5+
15,469
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
IIS · RoadRunner · share of sites in each country using one or the other
United States
117,730
7
India
58,829
6
United Kingdom
42,820
4
Italy
40,808
4
Brazil
34,656
4
Canada
31,601
1
Türkiye
31,246
2
Germany
31,200
39
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | RoadRunner |
|---|---|---|
| LCP | 1.7 s | 2.4 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 1100 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.