/**
 * ThreadTS Universal - Performance Monitoring System
 * Advanced performance tracking and diagnostics
 */
export interface PerformanceMetrics {
    timestamp: number;
    cpuUsage?: number;
    memoryUsage: {
        used: number;
        total: number;
        heap?: {
            used: number;
            total: number;
            limit: number;
        };
    };
    executionTime: number;
    throughput: number;
    errorRate: number;
    workerPoolStats?: {
        activeWorkers: number;
        idleWorkers: number;
        queuedTasks: number;
        averageTaskTime: number;
    };
}
export interface PerformanceAlert {
    type: 'memory' | 'cpu' | 'latency' | 'error_rate' | 'throughput';
    severity: 'low' | 'medium' | 'high' | 'critical';
    message: string;
    threshold: number;
    actualValue: number;
    timestamp: number;
    recommendations: string[];
}
export declare class PerformanceMonitor {
    private metrics;
    private alerts;
    private isMonitoring;
    private monitoringInterval?;
    private readonly thresholds;
    /**
     * Starts continuous performance monitoring
     */
    startMonitoring(intervalMs?: number): void;
    /**
     * Stops performance monitoring
     */
    stopMonitoring(): void;
    /**
     * Collects current performance metrics
     */
    collectMetrics(): PerformanceMetrics;
    /**
     * Gets current memory usage information
     */
    private getMemoryUsage;
    /**
     * Gets CPU usage (Node.js only)
     */
    private getCPUUsage;
    /**
     * Calculates average execution time from recent operations
     */
    private getAverageExecutionTime;
    /**
     * Calculates current throughput (operations per second)
     */
    private calculateThroughput;
    /**
     * Calculates current error rate
     */
    private calculateErrorRate;
    /**
     * Checks if metrics exceed thresholds and creates alerts
     */
    private checkThresholds;
    /**
     * Creates a performance alert
     */
    private createAlert;
    /**
     * Gets recent performance metrics
     */
    getMetrics(count?: number): PerformanceMetrics[];
    /**
     * Gets recent alerts
     */
    getAlerts(count?: number): PerformanceAlert[];
    /**
     * Generates a performance summary report
     */
    generateReport(): string;
    /**
     * Resets all collected metrics and alerts
     */
    reset(): void;
    /**
     * Gets the monitoring status
     */
    isActive(): boolean;
}
export declare const performanceMonitor: PerformanceMonitor;
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