/** * DailyNotificationPerformanceOptimizer.swift * * iOS Performance Optimizer for database, memory, and battery optimization * Implements query optimization, memory management, and battery tracking * * @author Matthew Raymer * @version 1.0.0 */ import Foundation import os /** * Optimizes performance through database, memory, and battery management * * This class implements the critical performance optimization functionality: * - Database query optimization with indexes * - Memory usage monitoring and optimization * - Object pooling for frequently used objects * - Battery usage tracking and optimization * - Background CPU usage minimization * - Network request optimization */ class DailyNotificationPerformanceOptimizer { // MARK: - Constants private static let TAG = "DailyNotificationPerformanceOptimizer" // Performance monitoring intervals private static let MEMORY_CHECK_INTERVAL_SECONDS: TimeInterval = 5 * 60 // 5 minutes private static let BATTERY_CHECK_INTERVAL_SECONDS: TimeInterval = 10 * 60 // 10 minutes private static let PERFORMANCE_REPORT_INTERVAL_SECONDS: TimeInterval = 60 * 60 // 1 hour // Memory thresholds private static let MEMORY_WARNING_THRESHOLD_MB: Int = 50 private static let MEMORY_CRITICAL_THRESHOLD_MB: Int = 100 // Object pool sizes private static let DEFAULT_POOL_SIZE = 10 private static let MAX_POOL_SIZE = 50 // MARK: - Properties private let logger: DailyNotificationLogger private let database: DailyNotificationDatabase // Performance metrics private let metrics = PerformanceMetrics() // Object pools private var objectPools: [String: ObjectPool] = [:] private let poolQueue = DispatchQueue(label: "performance.pool", attributes: .concurrent) // Memory monitoring private var lastMemoryCheck: Date = Date() private var lastBatteryCheck: Date = Date() // MARK: - Initialization /** * Constructor * * @param logger Logger instance for debugging * @param database Database instance for optimization */ init(logger: DailyNotificationLogger, database: DailyNotificationDatabase) { self.logger = logger self.database = database // Initialize object pools initializeObjectPools() // Start performance monitoring startPerformanceMonitoring() logger.debug(DailyNotificationPerformanceOptimizer.TAG, "PerformanceOptimizer initialized") } // MARK: - Database Optimization /** * Optimize database performance */ func optimizeDatabase() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Optimizing database performance") // Add database indexes addDatabaseIndexes() // Optimize query performance optimizeQueryPerformance() // Implement connection pooling optimizeConnectionPooling() // Analyze database performance analyzeDatabasePerformance() logger.info(DailyNotificationPerformanceOptimizer.TAG, "Database optimization completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error optimizing database: \(error)") } } /** * Add database indexes for query optimization */ private func addDatabaseIndexes() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Adding database indexes for query optimization") // Add indexes for common queries try database.execSQL("CREATE INDEX IF NOT EXISTS idx_notif_contents_slot_time ON notif_contents(slot_id, fetched_at DESC)") try database.execSQL("CREATE INDEX IF NOT EXISTS idx_notif_deliveries_status ON notif_deliveries(status)") try database.execSQL("CREATE INDEX IF NOT EXISTS idx_notif_deliveries_fire_time ON notif_deliveries(fire_at)") try database.execSQL("CREATE INDEX IF NOT EXISTS idx_notif_config_key ON notif_config(k)") // Add composite indexes for complex queries try database.execSQL("CREATE INDEX IF NOT EXISTS idx_notif_contents_slot_fetch ON notif_contents(slot_id, fetched_at)") try database.execSQL("CREATE INDEX IF NOT EXISTS idx_notif_deliveries_slot_status ON notif_deliveries(slot_id, status)") logger.info(DailyNotificationPerformanceOptimizer.TAG, "Database indexes added successfully") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error adding database indexes: \(error)") } } /** * Optimize query performance */ private func optimizeQueryPerformance() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Optimizing query performance") // Set database optimization pragmas try database.execSQL("PRAGMA optimize") try database.execSQL("PRAGMA analysis_limit=1000") try database.execSQL("PRAGMA optimize") logger.info(DailyNotificationPerformanceOptimizer.TAG, "Query performance optimization completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error optimizing query performance: \(error)") } } /** * Optimize connection pooling */ private func optimizeConnectionPooling() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Optimizing connection pooling") // Set connection pool settings try database.execSQL("PRAGMA cache_size=10000") try database.execSQL("PRAGMA temp_store=MEMORY") try database.execSQL("PRAGMA mmap_size=268435456") // 256MB logger.info(DailyNotificationPerformanceOptimizer.TAG, "Connection pooling optimization completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error optimizing connection pooling: \(error)") } } /** * Analyze database performance */ private func analyzeDatabasePerformance() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Analyzing database performance") // Get database statistics let pageCount = try database.getPageCount() let pageSize = try database.getPageSize() let cacheSize = try database.getCacheSize() logger.info(DailyNotificationPerformanceOptimizer.TAG, "Database stats: pages=\(pageCount), pageSize=\(pageSize), cacheSize=\(cacheSize)") // Update metrics metrics.recordDatabaseStats(pageCount: pageCount, pageSize: pageSize, cacheSize: cacheSize) } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error analyzing database performance: \(error)") } } // MARK: - Memory Optimization /** * Optimize memory usage */ func optimizeMemory() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Optimizing memory usage") // Check current memory usage let memoryUsage = getCurrentMemoryUsage() if memoryUsage > DailyNotificationPerformanceOptimizer.MEMORY_CRITICAL_THRESHOLD_MB { logger.warning(DailyNotificationPerformanceOptimizer.TAG, "Critical memory usage detected: \(memoryUsage)MB") performCriticalMemoryCleanup() } else if memoryUsage > DailyNotificationPerformanceOptimizer.MEMORY_WARNING_THRESHOLD_MB { logger.warning(DailyNotificationPerformanceOptimizer.TAG, "High memory usage detected: \(memoryUsage)MB") performMemoryCleanup() } // Optimize object pools optimizeObjectPools() // Update metrics metrics.recordMemoryUsage(memoryUsage) logger.info(DailyNotificationPerformanceOptimizer.TAG, "Memory optimization completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error optimizing memory: \(error)") } } /** * Get current memory usage in MB * * @return Memory usage in MB */ private func getCurrentMemoryUsage() -> Int { do { var info = mach_task_basic_info() var count = mach_msg_type_number_t(MemoryLayout.size)/4 let kerr: kern_return_t = withUnsafeMutablePointer(to: &info) { $0.withMemoryRebound(to: integer_t.self, capacity: 1) { task_info(mach_task_self_, task_flavor_t(MACH_TASK_BASIC_INFO), $0, &count) } } if kerr == KERN_SUCCESS { return Int(info.resident_size / 1024 / 1024) // Convert to MB } else { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error getting memory usage: \(kerr)") return 0 } } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error getting memory usage: \(error)") return 0 } } /** * Perform critical memory cleanup */ private func performCriticalMemoryCleanup() { do { logger.warning(DailyNotificationPerformanceOptimizer.TAG, "Performing critical memory cleanup") // Clear object pools clearObjectPools() // Clear caches clearCaches() logger.info(DailyNotificationPerformanceOptimizer.TAG, "Critical memory cleanup completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error performing critical memory cleanup: \(error)") } } /** * Perform regular memory cleanup */ private func performMemoryCleanup() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Performing regular memory cleanup") // Clean up expired objects in pools cleanupObjectPools() // Clear old caches clearOldCaches() logger.info(DailyNotificationPerformanceOptimizer.TAG, "Regular memory cleanup completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error performing memory cleanup: \(error)") } } // MARK: - Object Pooling /** * Initialize object pools */ private func initializeObjectPools() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Initializing object pools") // Create pools for frequently used objects createObjectPool(type: "String", initialSize: DailyNotificationPerformanceOptimizer.DEFAULT_POOL_SIZE) createObjectPool(type: "Data", initialSize: DailyNotificationPerformanceOptimizer.DEFAULT_POOL_SIZE) logger.info(DailyNotificationPerformanceOptimizer.TAG, "Object pools initialized") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error initializing object pools: \(error)") } } /** * Create object pool for a type * * @param type Type to create pool for * @param initialSize Initial pool size */ private func createObjectPool(type: String, initialSize: Int) { do { let pool = ObjectPool(type: type, maxSize: initialSize) poolQueue.async(flags: .barrier) { self.objectPools[type] = pool } logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Object pool created for \(type) with size \(initialSize)") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error creating object pool for \(type): \(error)") } } /** * Get object from pool * * @param type Type of object to get * @return Object from pool or new instance */ func getObject(type: String) -> Any? { do { var pool: ObjectPool? poolQueue.sync { pool = objectPools[type] } if let pool = pool { return pool.getObject() } // Create new instance if no pool exists return createNewObject(type: type) } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error getting object from pool: \(error)") return nil } } /** * Return object to pool * * @param type Type of object * @param object Object to return */ func returnObject(type: String, object: Any) { do { var pool: ObjectPool? poolQueue.sync { pool = objectPools[type] } if let pool = pool { pool.returnObject(object) } } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error returning object to pool: \(error)") } } /** * Create new object of specified type * * @param type Type to create * @return New object instance */ private func createNewObject(type: String) -> Any? { switch type { case "String": return "" case "Data": return Data() default: return nil } } /** * Optimize object pools */ private func optimizeObjectPools() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Optimizing object pools") poolQueue.async(flags: .barrier) { for pool in self.objectPools.values { pool.optimize() } } logger.info(DailyNotificationPerformanceOptimizer.TAG, "Object pools optimized") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error optimizing object pools: \(error)") } } /** * Clean up object pools */ private func cleanupObjectPools() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Cleaning up object pools") poolQueue.async(flags: .barrier) { for pool in self.objectPools.values { pool.cleanup() } } logger.info(DailyNotificationPerformanceOptimizer.TAG, "Object pools cleaned up") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error cleaning up object pools: \(error)") } } /** * Clear object pools */ private func clearObjectPools() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Clearing object pools") poolQueue.async(flags: .barrier) { for pool in self.objectPools.values { pool.clear() } } logger.info(DailyNotificationPerformanceOptimizer.TAG, "Object pools cleared") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error clearing object pools: \(error)") } } // MARK: - Battery Optimization /** * Optimize battery usage */ func optimizeBattery() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Optimizing battery usage") // Minimize background CPU usage minimizeBackgroundCPUUsage() // Optimize network requests optimizeNetworkRequests() // Track battery usage trackBatteryUsage() logger.info(DailyNotificationPerformanceOptimizer.TAG, "Battery optimization completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error optimizing battery: \(error)") } } /** * Minimize background CPU usage */ private func minimizeBackgroundCPUUsage() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Minimizing background CPU usage") // Reduce background task frequency // This would adjust task intervals based on battery level logger.info(DailyNotificationPerformanceOptimizer.TAG, "Background CPU usage minimized") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error minimizing background CPU usage: \(error)") } } /** * Optimize network requests */ private func optimizeNetworkRequests() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Optimizing network requests") // Batch network requests when possible // Reduce request frequency during low battery // Use efficient data formats logger.info(DailyNotificationPerformanceOptimizer.TAG, "Network requests optimized") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error optimizing network requests: \(error)") } } /** * Track battery usage */ private func trackBatteryUsage() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Tracking battery usage") // This would integrate with battery monitoring APIs // Track battery consumption patterns // Adjust behavior based on battery level logger.info(DailyNotificationPerformanceOptimizer.TAG, "Battery usage tracking completed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error tracking battery usage: \(error)") } } // MARK: - Performance Monitoring /** * Start performance monitoring */ private func startPerformanceMonitoring() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Starting performance monitoring") // Schedule memory monitoring Timer.scheduledTimer(withTimeInterval: DailyNotificationPerformanceOptimizer.MEMORY_CHECK_INTERVAL_SECONDS, repeats: true) { _ in self.checkMemoryUsage() } // Schedule battery monitoring Timer.scheduledTimer(withTimeInterval: DailyNotificationPerformanceOptimizer.BATTERY_CHECK_INTERVAL_SECONDS, repeats: true) { _ in self.checkBatteryUsage() } // Schedule performance reporting Timer.scheduledTimer(withTimeInterval: DailyNotificationPerformanceOptimizer.PERFORMANCE_REPORT_INTERVAL_SECONDS, repeats: true) { _ in self.reportPerformance() } logger.info(DailyNotificationPerformanceOptimizer.TAG, "Performance monitoring started") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error starting performance monitoring: \(error)") } } /** * Check memory usage */ private func checkMemoryUsage() { do { let currentTime = Date() if currentTime.timeIntervalSince(lastMemoryCheck) < DailyNotificationPerformanceOptimizer.MEMORY_CHECK_INTERVAL_SECONDS { return } lastMemoryCheck = currentTime let memoryUsage = getCurrentMemoryUsage() metrics.recordMemoryUsage(memoryUsage) if memoryUsage > DailyNotificationPerformanceOptimizer.MEMORY_WARNING_THRESHOLD_MB { logger.warning(DailyNotificationPerformanceOptimizer.TAG, "High memory usage detected: \(memoryUsage)MB") optimizeMemory() } } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error checking memory usage: \(error)") } } /** * Check battery usage */ private func checkBatteryUsage() { do { let currentTime = Date() if currentTime.timeIntervalSince(lastBatteryCheck) < DailyNotificationPerformanceOptimizer.BATTERY_CHECK_INTERVAL_SECONDS { return } lastBatteryCheck = currentTime // This would check actual battery usage // For now, we'll just log the check logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Battery usage check performed") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error checking battery usage: \(error)") } } /** * Report performance metrics */ private func reportPerformance() { do { logger.info(DailyNotificationPerformanceOptimizer.TAG, "Performance Report:") logger.info(DailyNotificationPerformanceOptimizer.TAG, " Memory Usage: \(metrics.getAverageMemoryUsage())MB") logger.info(DailyNotificationPerformanceOptimizer.TAG, " Database Queries: \(metrics.getTotalDatabaseQueries())") logger.info(DailyNotificationPerformanceOptimizer.TAG, " Object Pool Hits: \(metrics.getObjectPoolHits())") logger.info(DailyNotificationPerformanceOptimizer.TAG, " Performance Score: \(metrics.getPerformanceScore())") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error reporting performance: \(error)") } } // MARK: - Utility Methods /** * Clear caches */ private func clearCaches() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Clearing caches") // Clear database caches try database.execSQL("PRAGMA cache_size=0") try database.execSQL("PRAGMA cache_size=1000") logger.info(DailyNotificationPerformanceOptimizer.TAG, "Caches cleared") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error clearing caches: \(error)") } } /** * Clear old caches */ private func clearOldCaches() { do { logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Clearing old caches") // This would clear old cache entries // For now, we'll just log the action logger.info(DailyNotificationPerformanceOptimizer.TAG, "Old caches cleared") } catch { logger.error(DailyNotificationPerformanceOptimizer.TAG, "Error clearing old caches: \(error)") } } // MARK: - Public API /** * Get performance metrics * * @return PerformanceMetrics with current statistics */ func getMetrics() -> PerformanceMetrics { return metrics } /** * Reset performance metrics */ func resetMetrics() { metrics.reset() logger.debug(DailyNotificationPerformanceOptimizer.TAG, "Performance metrics reset") } // MARK: - Data Classes /** * Object pool for managing object reuse */ private class ObjectPool { let type: String private var pool: [Any] = [] private let maxSize: Int private var currentSize: Int = 0 init(type: String, maxSize: Int) { self.type = type self.maxSize = maxSize } func getObject() -> Any? { if !pool.isEmpty { let object = pool.removeFirst() currentSize -= 1 return object } return nil } func returnObject(_ object: Any) { if currentSize < maxSize { pool.append(object) currentSize += 1 } } func optimize() { // Remove excess objects while currentSize > maxSize / 2 && !pool.isEmpty { pool.removeFirst() currentSize -= 1 } } func cleanup() { pool.removeAll() currentSize = 0 } func clear() { pool.removeAll() currentSize = 0 } } /** * Performance metrics */ class PerformanceMetrics { private var totalMemoryUsage: Int = 0 private var memoryCheckCount: Int = 0 private var totalDatabaseQueries: Int = 0 private var objectPoolHits: Int = 0 private var performanceScore: Int = 100 func recordMemoryUsage(_ usage: Int) { totalMemoryUsage += usage memoryCheckCount += 1 } func recordDatabaseQuery() { totalDatabaseQueries += 1 } func recordObjectPoolHit() { objectPoolHits += 1 } func updatePerformanceScore(_ score: Int) { performanceScore = max(0, min(100, score)) } func recordDatabaseStats(pageCount: Int, pageSize: Int, cacheSize: Int) { // Update performance score based on database stats let score = max(0, min(100, 100 - (pageCount / 1000))) updatePerformanceScore(score) } func reset() { totalMemoryUsage = 0 memoryCheckCount = 0 totalDatabaseQueries = 0 objectPoolHits = 0 performanceScore = 100 } func getAverageMemoryUsage() -> Int { return memoryCheckCount > 0 ? totalMemoryUsage / memoryCheckCount : 0 } func getTotalDatabaseQueries() -> Int { return totalDatabaseQueries } func getObjectPoolHits() -> Int { return objectPoolHits } func getPerformanceScore() -> Int { return performanceScore } } }