Lazy Load – Optimize Images的作者是WP Rocket，目前有100,000+个有效安装。已经Tested with 5.4.1版本的wordpress。
Lazy Load by WP Rocket displays images and/or iframes on a page only when they are visible to the user. This reduces the number of HTTP requests mechanism and improves the loading time.
You can also replace Youtube iframes by a preview thumbnail to further speed up the loading time of your website.
Lazyload script: http://github.com/verlok/lazyload
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