LiteSpeed Cache
All-in-one unbeatable acceleration & PageSpeed improvement: caching, image/CSS/JS optimization...
Converts images to more modern formats such as WebP or AVIF during upload.
Displays placeholders based on an image's dominant color while the image is loading.
Making internationalization/localization in WordPress faster than ever before.
Enables browsers to speculatively prerender or prefetch pages when hovering over links.
Improvements for responsive images in WordPress.
Optimizes the performance of embeds by lazy-loading iframes and scripts.
Plugin Check is a WordPress.org tool which provides checks to help plugins meet the directory requirements and follow various best practices.
Defer the loading of all JavaScripts added with wp_enqueue_script(), using LABJS (an asynchronous javascript library).
Load Contact Form 7 & select CF7-related plugin scripts & styles only where needed.