ef.js vs GSAP
Head-to-head usage across the sites we track.
Top sites by authority
ef.js · GSAP · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
99
Open Page Rank 8+
1
1,449
Open Page Rank 7+
8
5,937
Open Page Rank 6+
17
12,342
Open Page Rank 5+
24
23,347
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
ef.js · GSAP · share of sites in each country using one or the other
United States
39
328,404
India
20
118,978
United Kingdom
15
105,671
Germany
14
102,329
France
16
97,822
Italy
16
96,801
Brazil
31
79,378
Spain
34
76,953
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | ef.js | GSAP |
|---|---|---|
| LCP | 1.6 s | 2 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 900 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.
ef.js to GSAP
| Domain | When |
|---|---|
| fundacionmusicforall.org | Feb 2026 |
GSAP to ef.js
| Domain | When |
|---|---|
| fundacionmusicforall.org | Feb 2026 |
| maheswarigroup.in | Dec 2025 |