export interface PerformanceMetric {
    name: string;
    startTime: number;
    endTime?: number;
    duration?: number;
}
export declare class PerformanceMonitor {
    private static metrics;
    private static globalStart;
    /**
     * Start timing an operation
     */
    static start(name: string): void;
    /**
     * End timing an operation
     */
    static end(name: string): number;
    /**
     * Get duration of an operation
     */
    static getDuration(name: string): number;
    /**
     * Clear all metrics
     */
    static clear(): void;
    /**
     * Estimate remaining time based on progress
     */
    static estimateRemaining(completed: number, total: number, elapsedMs: number): string;
}
/**
 * Connection pool for SSH connections to improve performance
 */
export declare class SSHConnectionPool {
    private static connections;
    /**
     * Get or create SSH connection
     */
    static getConnection(host: string, config: any, createFn: () => Promise<any>): Promise<any>;
    /**
     * Close all connections
     */
    static closeAll(): Promise<void>;
    /**
     * Close specific connection
     */
    static close(host: string, port: number): Promise<void>;
}
/**
 * Decorator to measure function execution time
 */
export declare function measure(metricName?: string): (target: any, propertyKey: string, descriptor: PropertyDescriptor) => PropertyDescriptor;
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