daily-notification-plugin/ios/Plugin/DailyNotificationPerformanceOptimizer.swift

/**
 * 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.log(.debug, "\(DailyNotificationPerformanceOptimizer.TAG): PerformanceOptimizer initialized")
    }
    
    // MARK: - Database Optimization
    
    /**
     * Optimize database performance
     */
    func optimizeDatabase() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Optimizing database performance")
            
            // Add database indexes
            addDatabaseIndexes()
            
            // Optimize query performance
            optimizeQueryPerformance()
            
            // Implement connection pooling
            optimizeConnectionPooling()
            
            // Analyze database performance
            analyzeDatabasePerformance()
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Database optimization completed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error optimizing database: \(error)")
        }
    }
    
    /**
     * Add database indexes for query optimization
     */
    private func addDatabaseIndexes() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Adding database indexes for query optimization")
            
            // Add indexes for common queries
            try database.executeSQL("CREATE INDEX IF NOT EXISTS idx_notif_contents_slot_time ON notif_contents(slot_id, fetched_at DESC)")
            try database.executeSQL("CREATE INDEX IF NOT EXISTS idx_notif_deliveries_status ON notif_deliveries(status)")
            try database.executeSQL("CREATE INDEX IF NOT EXISTS idx_notif_deliveries_fire_time ON notif_deliveries(fire_at)")
            try database.executeSQL("CREATE INDEX IF NOT EXISTS idx_notif_config_key ON notif_config(k)")
            
            // Add composite indexes for complex queries
            try database.executeSQL("CREATE INDEX IF NOT EXISTS idx_notif_contents_slot_fetch ON notif_contents(slot_id, fetched_at)")
            try database.executeSQL("CREATE INDEX IF NOT EXISTS idx_notif_deliveries_slot_status ON notif_deliveries(slot_id, status)")
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Database indexes added successfully")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error adding database indexes: \(error)")
        }
    }
    
    /**
     * Optimize query performance
     */
    private func optimizeQueryPerformance() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Optimizing query performance")
            
            // Set database optimization pragmas
            try database.executeSQL("PRAGMA optimize")
            try database.executeSQL("PRAGMA analysis_limit=1000")
            try database.executeSQL("PRAGMA optimize")
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Query performance optimization completed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error optimizing query performance: \(error)")
        }
    }
    
    /**
     * Optimize connection pooling
     */
    private func optimizeConnectionPooling() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Optimizing connection pooling")
            
            // Set connection pool settings
            try database.executeSQL("PRAGMA cache_size=10000")
            try database.executeSQL("PRAGMA temp_store=MEMORY")
            try database.executeSQL("PRAGMA mmap_size=268435456") // 256MB
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Connection pooling optimization completed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error optimizing connection pooling: \(error)")
        }
    }
    
    /**
     * Analyze database performance
     */
    private func analyzeDatabasePerformance() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Analyzing database performance")
            
            // Phase 1: Database stats methods not yet implemented
            // TODO: Phase 2 - Implement database statistics
            let pageCount: Int = 0
            let pageSize: Int = 0
            let cacheSize: Int = 0
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Database stats: pages=\(pageCount), pageSize=\(pageSize), cacheSize=\(cacheSize)")
            
            // Phase 1: Metrics recording not yet implemented
            // TODO: Phase 2 - Implement metrics recording
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error analyzing database performance: \(error)")
        }
    }
    
    // MARK: - Memory Optimization
    
    /**
     * Optimize memory usage
     */
    func optimizeMemory() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Optimizing memory usage")
            
            // Check current memory usage
            let memoryUsage = getCurrentMemoryUsage()
            
            if memoryUsage > DailyNotificationPerformanceOptimizer.MEMORY_CRITICAL_THRESHOLD_MB {
                logger.log(.warning, "DailyNotificationPerformanceOptimizer.TAG: Critical memory usage detected: \(memoryUsage)MB")
                performCriticalMemoryCleanup()
            } else if memoryUsage > DailyNotificationPerformanceOptimizer.MEMORY_WARNING_THRESHOLD_MB {
                logger.log(.warning, "DailyNotificationPerformanceOptimizer.TAG: High memory usage detected: \(memoryUsage)MB")
                performMemoryCleanup()
            }
            
            // Optimize object pools
            optimizeObjectPools()
            
            // Update metrics
            metrics.recordMemoryUsage(memoryUsage)
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Memory optimization completed")
            
        } catch {
            logger.log(.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<mach_task_basic_info>.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.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error getting memory usage: \(kerr)")
                return 0
            }
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error getting memory usage: \(error)")
            return 0
        }
    }
    
    /**
     * Perform critical memory cleanup
     */
    private func performCriticalMemoryCleanup() {
        do {
            logger.log(.warning, "DailyNotificationPerformanceOptimizer.TAG: Performing critical memory cleanup")
            
            // Clear object pools
            clearObjectPools()
            
            // Clear caches
            clearCaches()
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Critical memory cleanup completed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error performing critical memory cleanup: \(error)")
        }
    }
    
    /**
     * Perform regular memory cleanup
     */
    private func performMemoryCleanup() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Performing regular memory cleanup")
            
            // Clean up expired objects in pools
            cleanupObjectPools()
            
            // Clear old caches
            clearOldCaches()
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Regular memory cleanup completed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error performing memory cleanup: \(error)")
        }
    }
    
    // MARK: - Object Pooling
    
    /**
     * Initialize object pools
     */
    private func initializeObjectPools() {
        do {
            logger.log(.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.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Object pools initialized")
            
        } catch {
            logger.log(.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.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Object pool created for \(type) with size \(initialSize)")
            
        } catch {
            logger.log(.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.log(.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.log(.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.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Optimizing object pools")
            
            poolQueue.async(flags: .barrier) {
                for pool in self.objectPools.values {
                    pool.optimize()
                }
            }
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Object pools optimized")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error optimizing object pools: \(error)")
        }
    }
    
    /**
     * Clean up object pools
     */
    private func cleanupObjectPools() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Cleaning up object pools")
            
            poolQueue.async(flags: .barrier) {
                for pool in self.objectPools.values {
                    pool.cleanup()
                }
            }
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Object pools cleaned up")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error cleaning up object pools: \(error)")
        }
    }
    
    /**
     * Clear object pools
     */
    private func clearObjectPools() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Clearing object pools")
            
            poolQueue.async(flags: .barrier) {
                for pool in self.objectPools.values {
                    pool.clear()
                }
            }
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Object pools cleared")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error clearing object pools: \(error)")
        }
    }
    
    // MARK: - Battery Optimization
    
    /**
     * Optimize battery usage
     */
    func optimizeBattery() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Optimizing battery usage")
            
            // Minimize background CPU usage
            minimizeBackgroundCPUUsage()
            
            // Optimize network requests
            optimizeNetworkRequests()
            
            // Track battery usage
            trackBatteryUsage()
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Battery optimization completed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error optimizing battery: \(error)")
        }
    }
    
    /**
     * Minimize background CPU usage
     */
    private func minimizeBackgroundCPUUsage() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Minimizing background CPU usage")
            
            // Reduce background task frequency
            // This would adjust task intervals based on battery level
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Background CPU usage minimized")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error minimizing background CPU usage: \(error)")
        }
    }
    
    /**
     * Optimize network requests
     */
    private func optimizeNetworkRequests() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Optimizing network requests")
            
            // Batch network requests when possible
            // Reduce request frequency during low battery
            // Use efficient data formats
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Network requests optimized")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error optimizing network requests: \(error)")
        }
    }
    
    /**
     * Track battery usage
     */
    private func trackBatteryUsage() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Tracking battery usage")
            
            // This would integrate with battery monitoring APIs
            // Track battery consumption patterns
            // Adjust behavior based on battery level
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Battery usage tracking completed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error tracking battery usage: \(error)")
        }
    }
    
    // MARK: - Performance Monitoring
    
    /**
     * Start performance monitoring
     */
    private func startPerformanceMonitoring() {
        do {
            logger.log(.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.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Performance monitoring started")
            
        } catch {
            logger.log(.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.log(.warning, "DailyNotificationPerformanceOptimizer.TAG: High memory usage detected: \(memoryUsage)MB")
                optimizeMemory()
            }
            
        } catch {
            logger.log(.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.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Battery usage check performed")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error checking battery usage: \(error)")
        }
    }
    
    /**
     * Report performance metrics
     */
    private func reportPerformance() {
        do {
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Performance Report:")
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG:   Memory Usage: \(metrics.getAverageMemoryUsage())MB")
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG:   Database Queries: \(metrics.getTotalDatabaseQueries())")
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG:   Object Pool Hits: \(metrics.getObjectPoolHits())")
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG:   Performance Score: \(metrics.getPerformanceScore())")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error reporting performance: \(error)")
        }
    }
    
    // MARK: - Utility Methods
    
    /**
     * Clear caches
     */
    private func clearCaches() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Clearing caches")
            
            // Clear database caches
            try database.executeSQL("PRAGMA cache_size=0")
            try database.executeSQL("PRAGMA cache_size=1000")
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Caches cleared")
            
        } catch {
            logger.log(.error, "DailyNotificationPerformanceOptimizer.TAG: Error clearing caches: \(error)")
        }
    }
    
    /**
     * Clear old caches
     */
    private func clearOldCaches() {
        do {
            logger.log(.debug, "DailyNotificationPerformanceOptimizer.TAG: Clearing old caches")
            
            // This would clear old cache entries
            // For now, we'll just log the action
            
            logger.log(.info, "DailyNotificationPerformanceOptimizer.TAG: Old caches cleared")
            
        } catch {
            logger.log(.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.log(.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
        }
    }
}