Java vs WebAssembly
Head-to-head usage across the sites we track.
Top sites by authority
Java · WebAssembly · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
127
9
Open Page Rank 8+
2,258
24
Open Page Rank 7+
8,728
40
Open Page Rank 6+
15,094
64
Open Page Rank 5+
23,134
86
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Java · WebAssembly · share of sites in each country using one or the other
United States
103,678
419
India
46,985
278
United Kingdom
34,408
263
Germany
34,013
235
Canada
30,613
229
Indonesia
29,812
239
Brazil
29,287
403
Spain
28,586
195
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Java | WebAssembly |
|---|---|---|
| LCP | 1.9 s | 2.7 s |
| INP | 75 ms | 125 ms |
| CLS | 0 | 0.05 |
| TTFB | 700 ms | 600 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.