RackCache vs WordPress Super Cache
Head-to-head usage across the sites we track.
Top sites by authority
RackCache · WordPress Super Cache · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
RackCache · WordPress Super Cache · share of sites in each country using one or the other
United States
5,043
28,723
France
1,111
15,995
Germany
1,367
15,157
Spain
1,021
12,551
Italy
1,011
11,982
Japan
1,271
11,525
United Kingdom
1,685
10,340
India
1,576
9,928
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | RackCache | WordPress Super Cache |
|---|---|---|
| LCP | 2 s | 2.2 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 1200 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
RackCache to WordPress Super Cache
| Domain | When |
|---|---|
| gidedental.com | Oct 2025 |