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+
61
0
Open Page Rank 8+
1,315
1
Open Page Rank 7+
5,213
1
Open Page Rank 6+
9,906
1
Open Page Rank 5+
16,556
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
136,825
5
India
68,343
5
United Kingdom
49,161
3
Italy
46,831
3
Brazil
38,951
3
Türkiye
36,724
3
Canada
36,284
1
Germany
36,200
51
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | IIS | RoadRunner |
|---|---|---|
| LCP | 1.7 s | 2.2 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0.05 |
| TTFB | 700 ms | 1200 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.