import type { Context } from '../context.js';
interface PerformanceMetrics {
    method: string;
    path: string;
    responseTime: number;
    statusCode: number;
    timestamp: number;
    memoryUsage?: {
        rss: number;
        heapTotal: number;
        heapUsed: number;
        external: number;
    };
    requestSize?: number;
    responseSize?: number;
}
interface PerformanceMonitorOptions {
    enabled?: boolean;
    endpoint?: string;
    slowThreshold?: number;
    maxEntries?: number;
    includeMemory?: boolean;
    includeSizes?: boolean;
    logSlowRequests?: boolean;
}
/**
 * Performance monitor for development - tracks API response times and bottlenecks
 */
export declare class PerformanceMonitor {
    private metrics;
    options: Required<PerformanceMonitorOptions>;
    constructor(options?: PerformanceMonitorOptions);
    /**
     * Record a performance metric
     */
    recordMetric(metric: PerformanceMetrics): void;
    /**
     * Get all metrics
     */
    getMetrics(): PerformanceMetrics[];
    /**
     * Get performance statistics
     */
    getStats(): {
        totalRequests: number;
        averageResponseTime: number;
        slowestRequest: number;
        fastestRequest: number;
        requestsPerSecond: number;
        errorRate: number;
        slowRequests: number;
    };
    /**
     * Get metrics grouped by endpoint
     */
    getMetricsByEndpoint(): Record<string, PerformanceMetrics[]>;
    /**
     * Clear all metrics
     */
    clearMetrics(): void;
    /**
     * Generate HTML performance dashboard
     */
    generateHTML(): string;
    /**
     * Generate ASCII performance report
     */
    generateASCII(): string;
}
/**
 * Performance monitoring middleware
 */
export declare function performanceMonitor(options?: PerformanceMonitorOptions): (ctx: Context, next: () => Promise<void>) => Promise<void>;
/**
 * Get the global performance monitor instance
 */
export declare function getPerformanceMonitor(): PerformanceMonitor | null;
/**
 * Print performance report to console
 */
export declare function printPerformanceReport(): void;
export {};
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