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+
53
0
Open Page Rank 8+
1,275
1
Open Page Rank 7+
5,011
1
Open Page Rank 6+
9,561
1
Open Page Rank 5+
15,981
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
121,069
7
India
60,068
5
United Kingdom
43,214
3
Italy
39,691
4
Brazil
35,276
3
Germany
31,791
36
Canada
31,780
1
Türkiye
31,323
3
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | RoadRunner |
|---|---|---|
| LCP | 1.6 s | 2.3 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 1100 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.