Chart.js vs uPlot
Head-to-head usage across the sites we track.
Top sites by authority
Chart.js · uPlot · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
52
1
Open Page Rank 8+
903
1
Open Page Rank 7+
3,177
1
Open Page Rank 6+
5,538
2
Open Page Rank 5+
8,772
4
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Chart.js · uPlot · share of sites in each country using one or the other
United States
54,017
10
India
28,724
7
Germany
24,266
8
Italy
22,638
3
United Kingdom
20,687
5
Spain
20,634
3
France
20,440
4
Brazil
19,935
5
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Chart.js | uPlot |
|---|---|---|
| LCP | 2.2 s | 1.6 s |
| INP | 75 ms | 125 ms |
| CLS | 0 | 0 |
| TTFB | 1000 ms | 500 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.