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interface PerformanceMetrics {\r\n bundleSize: {\r\n raw: number;\r\n gzipped: number;\r\n minified: number;\r\n };\r\n runtime: {\r\n renderTime: number;\r\n uploadSpeed: number;\r\n memoryUsage: number;\r\n cpuUsage: number;\r\n };\r\n userExperience: {\r\n timeToInteractive: number;\r\n firstUploadTime: number;\r\n errorRate: number;\r\n successRate: number;\r\n };\r\n}\r\n\r\nexport class PerformanceMonitor {\r\n private static instance: PerformanceMonitor;\r\n private events: Array<{\r\n type: \"render\" | \"upload\" | \"validation\" | \"error\" | \"success\";\r\n timestamp: number;\r\n duration?: number;\r\n metadata?: Record;\r\n }> = [];\r\n private startTime: number = performance.now();\r\n private renderStartTime: number = 0;\r\n private uploadStartTimes: Map = new Map();\r\n\r\n private constructor() {}\r\n\r\n static getInstance(): PerformanceMonitor {\r\n if (!PerformanceMonitor.instance) {\r\n PerformanceMonitor.instance = new PerformanceMonitor();\r\n }\r\n return PerformanceMonitor.instance;\r\n }\r\n\r\n startRender(): void {\r\n this.renderStartTime = performance.now();\r\n }\r\n\r\n endRender(): number {\r\n const duration = performance.now() - this.renderStartTime;\r\n this.events.push({\r\n type: \"render\",\r\n timestamp: Date.now(),\r\n duration,\r\n });\r\n return duration;\r\n }\r\n\r\n startUpload(fileId: string): void {\r\n this.uploadStartTimes.set(fileId, performance.now());\r\n }\r\n\r\n endUpload(fileId: string, success: boolean): number {\r\n const startTime = this.uploadStartTimes.get(fileId);\r\n if (!startTime) return 0;\r\n\r\n const duration = performance.now() - startTime;\r\n this.uploadStartTimes.delete(fileId);\r\n\r\n this.events.push({\r\n type: success ? \"success\" : \"error\",\r\n timestamp: Date.now(),\r\n duration,\r\n metadata: { fileId, success },\r\n });\r\n\r\n return duration;\r\n }\r\n\r\n recordEvent(\r\n type: \"render\" | \"upload\" | \"validation\" | \"error\" | \"success\",\r\n metadata?: Record\r\n ): void {\r\n this.events.push({\r\n type,\r\n timestamp: Date.now(),\r\n metadata,\r\n });\r\n }\r\n\r\n getMetrics(): PerformanceMetrics {\r\n const renderEvents = this.events.filter((e) => e.type === \"render\");\r\n const successEvents = this.events.filter((e) => e.type === \"success\");\r\n const errorEvents = this.events.filter((e) => e.type === \"error\");\r\n\r\n const avgRenderTime =\r\n renderEvents.length > 0\r\n ? renderEvents.reduce((sum, e) => sum + (e.duration || 0), 0) /\r\n renderEvents.length\r\n : 0;\r\n\r\n const avgUploadTime =\r\n successEvents.length > 0\r\n ? successEvents.reduce((sum, e) => sum + (e.duration || 0), 0) /\r\n successEvents.length\r\n : 0;\r\n\r\n const uploadSpeed = avgUploadTime > 0 ? 1000 / avgUploadTime : 0; // files per second\r\n const errorRate =\r\n this.events.length > 0 ? errorEvents.length / this.events.length : 0;\r\n const successRate =\r\n this.events.length > 0 ? successEvents.length / this.events.length : 0;\r\n\r\n return {\r\n bundleSize: {\r\n raw: this.getBundleSize(),\r\n gzipped: this.getBundleSize() * 0.3, // Approximate gzip ratio\r\n minified: this.getBundleSize() * 0.7, // Approximate minification ratio\r\n },\r\n runtime: {\r\n renderTime: avgRenderTime,\r\n uploadSpeed,\r\n memoryUsage: this.getMemoryUsage(),\r\n cpuUsage: this.getCpuUsage(),\r\n },\r\n userExperience: {\r\n timeToInteractive: this.getTimeToInteractive(),\r\n firstUploadTime: this.getFirstUploadTime(),\r\n errorRate,\r\n successRate,\r\n },\r\n };\r\n }\r\n\r\n private getBundleSize(): number {\r\n // This would be calculated during build time\r\n // For now, return an estimated size based on typical React component\r\n return 40 * 1024; // 40KB estimated\r\n }\r\n\r\n private getMemoryUsage(): number {\r\n if (\"memory\" in performance) {\r\n const memory = (performance as any).memory;\r\n return memory.usedJSHeapSize / memory.jsHeapSizeLimit;\r\n }\r\n return 0;\r\n }\r\n\r\n private getCpuUsage(): number {\r\n // CPU usage is difficult to measure in browsers\r\n // This is a simplified approximation\r\n return 0;\r\n }\r\n\r\n private getTimeToInteractive(): number {\r\n const firstRender = this.events.find((e) => e.type === \"render\");\r\n return firstRender ? firstRender.timestamp - this.startTime : 0;\r\n }\r\n\r\n private getFirstUploadTime(): number {\r\n const firstUpload = this.events.find((e) => e.type === \"success\");\r\n return firstUpload ? firstUpload.timestamp - this.startTime : 0;\r\n }\r\n\r\n reset(): void {\r\n this.events = [];\r\n this.startTime = performance.now();\r\n this.uploadStartTimes.clear();\r\n }\r\n\r\n exportData(): Array<{\r\n type: \"render\" | \"upload\" | \"validation\" | \"error\" | \"success\";\r\n timestamp: number;\r\n duration?: number;\r\n metadata?: Record;\r\n }> {\r\n return [...this.events];\r\n }\r\n}\r\n\r\n// Performance optimization utilities\r\nexport class PerformanceOptimizer {\r\n static debounce any>(\r\n func: T,\r\n wait: number\r\n ): (...args: Parameters) => void {\r\n let timeout: NodeJS.Timeout;\r\n return (...args: Parameters) => {\r\n clearTimeout(timeout);\r\n timeout = setTimeout(() => func(...args), wait);\r\n };\r\n }\r\n\r\n static throttle any>(\r\n func: T,\r\n limit: number\r\n ): (...args: Parameters) => void {\r\n let inThrottle: boolean;\r\n return (...args: Parameters) => {\r\n if (!inThrottle) {\r\n func(...args);\r\n inThrottle = true;\r\n setTimeout(() => (inThrottle = false), limit);\r\n }\r\n };\r\n }\r\n\r\n static memoize any>(\r\n func: T,\r\n keyGenerator?: (...args: Parameters) => string\r\n ): T {\r\n const cache = new Map>();\r\n\r\n return ((...args: Parameters) => {\r\n const key = keyGenerator ? keyGenerator(...args) : JSON.stringify(args);\r\n\r\n if (cache.has(key)) {\r\n return cache.get(key);\r\n }\r\n\r\n const result = func(...args);\r\n cache.set(key, result);\r\n return result;\r\n }) as T;\r\n }\r\n\r\n static async retry(\r\n operation: () => Promise,\r\n options: { maxAttempts?: number; delay?: number } = {}\r\n ): Promise {\r\n const { maxAttempts = 3, delay = 1000 } = options;\r\n let lastError: Error;\r\n\r\n for (let i = 0; i < maxAttempts; i++) {\r\n try {\r\n return await operation();\r\n } catch (error) {\r\n lastError = error as Error;\r\n if (i < maxAttempts - 1) {\r\n await new Promise((resolve) =>\r\n setTimeout(resolve, delay * Math.pow(2, i))\r\n );\r\n }\r\n }\r\n }\r\n\r\n throw lastError!;\r\n }\r\n}\r\n"]}