Data-Driven Design and
Performance Optimization

# Enable GZIP Compression <IfModule mod_deflate.c> AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/html AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE application/xml AddOutputFilterByType DEFLATE application/xhtml+xml AddOutputFilterByType DEFLATE application/rss+xml AddOutputFilterByType DEFLATE application/javascript AddOutputFilterByType DEFLATE application/x-javascript </IfModule> # Browser Caching <IfModule mod_expires.c> ExpiresActive On ExpiresByType image/jpg "access plus 1 year" ExpiresByType image/jpeg "access plus 1 year" ExpiresByType image/gif "access plus 1 year" ExpiresByType image/png "access plus 1 year" ExpiresByType text/css "access plus 1 month" ExpiresByType application/pdf "access plus 1 month" ExpiresByType text/x-javascript "access plus 1 month" </IfModule>

try { $pdo = new PDO("mysql:host=$host;dbname=$db;charset=utf8mb4", $user, $pass); $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); // Bad Example: SELECT * FROM users (Retrieves all data, slow) // Good Example: Pull only required columns and use LIMIT $stmt = $pdo->prepare("SELECT id, username, email FROM users WHERE status = ? LIMIT 10"); $stmt->execute([1]); $results = $stmt->fetchAll(PDO::FETCH_ASSOC); // Cache mechanism (Redis/Memcached) integration can be added here } catch(PDOException $e) { error_log("Database Error: " . $e->getMessage()); }

<picture> <!-- For browsers that support WebP format --> <source srcset="image.webp" type="image/webp"> <!-- Backup as standard JPG --> <img src="image.jpg" alt="SEO Compatible Description" width="800" height="600" loading="lazy" class="img-fluid" > </picture> <script> // for Interaction to Next Paint (INP) optimization // Execute JavaScript operations without blocking the main thread document.addEventListener('DOMContentLoaded', () => { // Non-critical JS codes... }); </script>