Speed Optimizer vs WP Rocket | YouTube Preview Image Resolution
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| Feature | Speed Optimizer v7.8.5 · checked 23 Oct 2026 Free · ★ 4.2/5 Visit Details | WP Rocket | YouTube Preview Image Resolution checked 23 Oct 2026 Free Visit Details |
|---|---|---|
| At a glance | ||
| Active installs | 1M+ | — |
| Last updated | October 20, 2026 | — |
| Editions | Speed Optimizer | WP Rocket | YouTube Preview Image Resolution |
| Pros | Page caching, minification and lazy loading in one place; Browser cache headers and database cleanup; Free, from the WordPress.org directory | Sets the preview image size WP Rocket uses for lazy loaded YouTube videos; Small single-file code with one filter hook |
| Cons | Dynamic caching and Memcached are SiteGround-only; CDN premium tier depends on the hosting plan; Calls Google PageSpeed and Google Fonts services | Resolution is hard-coded and needs a file edit to change; Only useful alongside WP Rocket |
| Features (Speed Optimization plugins checklist) | ||
| Page cache | Yes | — |
| Browser cache | Yes | — |
| Minify CSS/JS | Yes | — |
| CDN | Paid | — |
| Object cache | Yes | — |
| Database cleanup | Yes | — |
| Free version | Yes | — |
| More features | ||
| Other features | Lazy loading of images, iframes and videos, Image optimisation, WebP image conversion, Force HTTPS, Heartbeat control, PageSpeed analysis | Sets YouTube preview image resolution |
| Integrations | ||
| Analytics | Google PageSpeed Insights | — |
| Plugins | — | WP Rocket |
| Other | Google Fonts | — |
| Requires WordPress | 5.5.1 | — |
| Requires PHP | 7.0 | — |
| Tested up to | 7.1 | — |
| Phones home | No | No |
| External services | www.googleapis.com, fonts.googleapis.com, sgwpdemo.com, api.wordpress.org | — |