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
97
Open Page Rank 8+
1
1,446
Open Page Rank 7+
6
5,938
Open Page Rank 6+
17
12,399
Open Page Rank 5+
23
23,449
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
374,319
India
20
135,440
United Kingdom
18
119,878
Germany
17
113,182
France
17
112,048
Italy
19
105,125
Brazil
34
87,855
Canada
11
85,143
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | ef.js | GSAP |
|---|---|---|
| LCP | 1.4 s | 2 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 900 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.
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 |