diff --git a/Dockerfile b/Dockerfile
index b505e56..09b24a7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,7 +12,7 @@ RUN apt-get update && apt-get install -y \
         libmagickwand-dev \
         unzip \
     && docker-php-ext-configure gd --with-jpeg --with-webp \
-    && docker-php-ext-install pdo_sqlite zip gd \
+    && docker-php-ext-install pdo_sqlite zip gd opcache \
     && pecl install imagick \
     && docker-php-ext-enable imagick
 
diff --git a/bookmarks.php b/bookmarks.php
index 0a68eef..0f62a74 100644
--- a/bookmarks.php
+++ b/bookmarks.php
@@ -467,7 +467,7 @@ require_once 'include/header.php';
                                     <li class="list-group-item d-flex justify-content-between align-items-center" data-id="<?php echo $bookmark['id']; ?>">
                                         <span>
                                             <i class="bi bi-grip-vertical sort-handle" style="cursor: move;"></i>
-                                            <img src="<?php echo $icon_src; ?>" class="ms-2 me-2" style="width: 16px; height: 16px;" onerror="this.onerror=null;this.src='include/images/default-icon.png';">
+                                            <img src="<?php echo $icon_src; ?>" class="ms-2 me-2" style="width: 16px; height: 16px;" loading="lazy" onerror="this.onerror=null;this.src='include/images/default-icon.png';">
                                             <a href="<?php echo htmlspecialchars($bookmark['url']); ?>" <?php if($settings['open_new_tab'] ?? '1' === '1') echo 'target="_blank"'; ?>><?php echo htmlspecialchars($bookmark['title']); ?></a>
                                             <?php if ($bookmark['is_favorite']): ?>
                                                 <i class="bi bi-star-fill text-warning" title="Favorite"></i>
diff --git a/docker/php.ini b/docker/php.ini
index 5efcf4d..7e20906 100644
--- a/docker/php.ini
+++ b/docker/php.ini
@@ -4,6 +4,15 @@ memory_limit = 512M
 max_execution_time = 300
 extension=imagick.so
 
+[opcache]
+opcache.enable=1
+opcache.memory_consumption=128
+opcache.interned_strings_buffer=8
+opcache.max_accelerated_files=4000
+opcache.revalidate_freq=60
+opcache.fast_shutdown=1
+opcache.enable_cli=1
+
 ; Session configuration
 session.cookie_lifetime = 86400
 session.gc_maxlifetime = 86400
diff --git a/include/header.php b/include/header.php
index 6fdfde5..8d87077 100644
--- a/include/header.php
+++ b/include/header.php
@@ -62,6 +62,7 @@ if ($theme === 'dark' || in_array('dark-background-active', $body_classes)) {
     <link rel="apple-touch-icon" sizes="180x180" href="<?php echo htmlspecialchars($settings['site_favicon'] ?? $settings['site_logo'] ?? 'include/images/favicon.ico'); ?>">
     <link rel="apple-touch-icon" sizes="152x152" href="<?php echo htmlspecialchars($settings['site_favicon'] ?? $settings['site_logo'] ?? 'include/images/favicon.ico'); ?>">
     <link rel="apple-touch-icon" sizes="120x120" href="<?php echo htmlspecialchars($settings['site_favicon'] ?? $settings['site_logo'] ?? 'include/images/favicon.ico'); ?>">
+    <link rel="preconnect" href="https://cdn.jsdelivr.net">
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
     <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.5/font/bootstrap-icons.css" rel="stylesheet">
     <link href="include/css/style.css" rel="stylesheet">
diff --git a/index.php b/index.php
index c9b5ba6..6581d3d 100644
--- a/index.php
+++ b/index.php
@@ -166,7 +166,7 @@ require_once 'include/header.php';
                         ?>
                         <div class="col-lg-2 col-md-3 col-sm-4 col-6 mb-3">
                             <a href="<?php echo htmlspecialchars($bookmark['url']); ?>" <?php echo $target_attr; ?> class="btn d-flex align-items-center text-start p-2 bookmark-link">
-                                <img src="<?php echo $icon_src; ?>" alt="" class="bookmark-favorite-icon me-3" onerror="this.onerror=null;this.src='include/images/default-icon.png';">
+                                <img src="<?php echo $icon_src; ?>" alt="" class="bookmark-favorite-icon me-3" loading="lazy" onerror="this.onerror=null;this.src='include/images/default-icon.png';">
                                 <div>
                                     <span><?php echo htmlspecialchars($bookmark['title']); ?></span>
                                     <small class="d-block text-muted"><?php echo htmlspecialchars($display_url); ?></small>
@@ -209,7 +209,7 @@ require_once 'include/header.php';
                                 }
                                 ?>
                                 <a href="<?php echo htmlspecialchars($bookmark['url']); ?>" <?php echo $target_attr; ?> class="list-group-item list-group-item-action d-flex align-items-center">
-                                    <img src="<?php echo $icon_src; ?>" alt="" class="bookmark-icon me-2" onerror="this.onerror=null;this.src='include/images/default-icon.png';">
+                                    <img src="<?php echo $icon_src; ?>" alt="" class="bookmark-icon me-2" loading="lazy" onerror="this.onerror=null;this.src='include/images/default-icon.png';">
                                     <span><?php echo htmlspecialchars($bookmark['title']); ?></span>
                                 </a>
                             <?php endforeach; ?>