WordPress plugin comparison
Async JavaScript vs Speed Optimizer
At a glance
- Speed Optimizer has more active installs: 1M+, against 60K+ for Async JavaScript.
- On a typical day, Speed Optimizer is downloaded about 5,598 times, Async JavaScript about 98.
- Async JavaScript is rated higher: 4.7 out of 5 from 102 reviews, against 4.2 from 641 reviews.
- Speed Optimizer was updated more recently: Nov 2, 2026, against Jun 22, 2023 for Async JavaScript.
- Speed Optimizer is tested with a newer WordPress: 7.1.4, against 6.2.15 for Async JavaScript.
Line by line
Speed Optimizer leads on 6 of 7 comparable lines.
| Metric |  Async JavaScript |  Speed Optimizer |
|---|---|---|
| Popular rank | #621 | #44 |
| Active installs | 60K+ | 1M+ |
| Downloads, last 30 days | 2.6K | 3.5M |
| Rating | 4.7(102) | 4.2(641) |
| Support threads resolved | – | 57% |
| Tested up to | 6.2.15 | 7.1.4 |
| Search multiplier | ×0.05 | ×2.73 |
| Last release | 3 years ago | 6 days ago |
| Requires PHP | – | 7.0 |
From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.
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