SPDY vs Webpack
Head-to-head usage across the sites we track.
Top sites by authority
SPDY · Webpack · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
190
Open Page Rank 8+
0
3,313
Open Page Rank 7+
1
13,524
Open Page Rank 6+
1
25,476
Open Page Rank 5+
3
42,724
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
SPDY · Webpack · share of sites in each country using one or the other
United States
20
280,614
India
71
151,337
Germany
9
119,668
United Kingdom
11
113,937
France
6
97,546
Brazil
9
97,414
Canada
8
87,677
Spain
7
71,269
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | SPDY | Webpack |
|---|---|---|
| LCP | 2.3 s | 2 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 700 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.