API Performance

Response Caching

class CacheMiddleware {
    public function handle($request) {
        $key = $this->getCacheKey($request);
        
        if ($cached = $this->cache->get($key)) {
            return $cached;
        }

        $response = $this->processRequest($request);
        $this->cache->set($key, $response, 3600);
        
        return $response;
    }
}

Cache Headers

header('Cache-Control: public, max-age=3600');
header('ETag: "' . md5($content) . '"');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $lastModified) . ' GMT');

Query Optimization

// Gunakan index
CREATE INDEX idx_user_email ON users(email);

// Pilih kolom spesifik
SELECT id, name, email FROM users WHERE status = 'active';

// Gunakan joins yang efisien
SELECT u.*, p.* 
FROM users u 
INNER JOIN profiles p ON u.id = p.user_id 
WHERE u.status = 'active';

Pagination

class PaginatedResponse {
    public function paginate($query, $page = 1, $perPage = 10) {
        $total = $query->count();
        $items = $query->offset(($page - 1) * $perPage)
                      ->limit($perPage)
                      ->get();

        return [
            'data' => $items,
            'pagination' => [
                'total' => $total,
                'per_page' => $perPage,
                'current_page' => $page,
                'last_page' => ceil($total / $perPage)
            ]
        ];
    }
}

Data Filtering

class DataFilter {
    public function filter($data, $fields) {
        return array_intersect_key($data, array_flip($fields));
    }
}

// Enable GZIP compression
if (extension_loaded('zlib')) {
    ini_set('zlib.output_compression', 'On');
    ini_set('zlib.output_compression_level', '5');
}

upstream api_servers {
    server api1.example.com:80;
    server api2.example.com:80;
    server api3.example.com:80;
}

server {
    listen 80;
    server_name api.example.com;

    location / {
        proxy_pass http://api_servers;
    }
}

class PerformanceMonitor {
    public function logMetrics($request, $response, $startTime) {
        $endTime = microtime(true);
        $duration = $endTime - $startTime;
        
        $metrics = [
            'endpoint' => $request->getPath(),
            'method' => $request->getMethod(),
            'duration' => $duration,
            'memory' => memory_get_peak_usage(true),
            'timestamp' => time()
        ];
        
        $this->logger->log('performance', $metrics);
    }
}