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
101
Open Page Rank 8+
1
1,442
Open Page Rank 7+
7
5,971
Open Page Rank 6+
17
12,404
Open Page Rank 5+
23
23,472
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
38
336,193
India
17
120,243
United Kingdom
16
105,254
Germany
13
103,146
France
15
94,934
Italy
13
90,969
Brazil
31
81,278
Canada
12
75,336
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | ef.js | GSAP |
|---|---|---|
| LCP | 1.5 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, Aug 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 |