WordPress sites loading slowly due to images? Native lazy loading with modern techniques dramatically improves performance. // Add to functions.php function add_lazy_loading_attributes($content) { // Only run on frontend if (is_admin() || wp_is_json_request()) { return $content; } // Use DOMDocument for reliable parsing if (class_exists(‘DOMDocument’)) { $dom = new DOMDocument(); @$dom->loadHTML(mb_convert_encoding($content, ‘HTML-ENTITIES’, ‘UTF-8’)); $images = $dom->getElementsByTagName(‘img’); […]