PerfectApps Swift vs Vitals
Head-to-head usage across the sites we track.
Top sites by authority
PerfectApps Swift · Vitals · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
1
1
Open Page Rank 8+
1
4
Open Page Rank 7+
2
8
Open Page Rank 6+
2
12
Open Page Rank 5+
2
33
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
PerfectApps Swift · Vitals · share of sites in each country using one or the other
United States
152
3,310
United Kingdom
61
1,382
India
41
1,273
Canada
43
993
Germany
35
992
Australia
35
956
France
28
905
Italy
27
674
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | PerfectApps Swift | Vitals |
|---|---|---|
| LCP | 1.6 s | 1.6 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 500 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.