/**
 * Performance Monitoring System
 * Track and analyze API performance metrics
 */
import type { RequestConfig } from 'fetchff';
import type { ApiPerformanceMetrics, RequestPerformance } from '@plyaz/types/api';
/**
 * Performance monitor class for tracking API metrics
 */
export declare class PerformanceMonitor {
    private metrics;
    private requestTimings;
    private requestPerformance;
    private maxHistorySize;
    /**
     * Create performance monitoring configuration
     */
    createMonitoringConfig(): Pick<RequestConfig, 'onRequest' | 'onResponse' | 'onError'>;
    /**
     * Update average response time
     */
    private updateAverageResponseTime;
    /**
     * Record request performance data
     */
    private recordRequestPerformance;
    /**
     * Get current metrics
     */
    getMetrics(): ApiPerformanceMetrics;
    /**
     * Track response timing and performance
     */
    private trackResponseTiming;
    /**
     * Track optimization metrics
     */
    private trackOptimizationMetrics;
    /**
     * Get performance history
     */
    getPerformanceHistory(): RequestPerformance[];
    /**
     * Calculate optimization metrics
     */
    private calculateOptimizationMetrics;
    /**
     * Generate all recommendations
     */
    private generateAllRecommendations;
    /**
     * Get performance summary
     */
    getSummary(): {
        metrics: ApiPerformanceMetrics;
        optimization: {
            requestsSaved: number;
            cacheEfficiency: number;
            dedupeEfficiency: number;
            errorRecovery: number;
        };
        recommendations: string[];
    };
    /**
     * Reset all metrics
     */
    reset(): void;
    /**
     * Set maximum history size
     */
    setMaxHistorySize(size: number): void;
}
/**
 * Global performance monitor instance
 */
export declare const performanceMonitor: PerformanceMonitor;
/**
 * Format metrics for display
 */
export declare function formatMetrics(metrics: ApiPerformanceMetrics): string;
/**
 * Log performance metrics to console
 */
export declare function logMetrics(label?: string): void;
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