/**
 * Resource tracking logic for CPU and memory monitoring
 */
import type { InternalResourceMeasurement } from '../types/middleware.types';
/**
 * Resource tracker for monitoring CPU and memory usage per request
 */
export declare function createResourceTracker(): {
    startTracking: typeof startTracking;
    stopTracking: typeof stopTracking;
    getSystemMetrics: typeof getSystemMetrics;
};
/**
 * Start resource tracking for a request
 */
export declare function startTracking(): InternalResourceMeasurement;
/**
 * Stop resource tracking and calculate deltas
 */
export declare function stopTracking(startMeasurement: InternalResourceMeasurement): {
    memoryUsageBytes: number;
    cpuTimeSeconds: number;
    durationMs: number;
    endMeasurement: InternalResourceMeasurement;
};
/**
 * Get current system-wide metrics
 */
export declare function getSystemMetrics(): {
    memoryUsagePercent: number;
    cpuUsagePercent: number;
};
/**
 * Create a continuous system metrics monitor
 */
export declare function createSystemMetricsMonitor(intervalMs?: number): {
    start: () => void;
    stop: () => void;
    getCurrentMetrics: () => {
        memoryUsagePercent: number;
        cpuUsagePercent: number;
    };
};
/**
 * Analyze resource usage pattern
 */
export declare function analyzeResourceUsage(measurements: InternalResourceMeasurement[]): {
    averageMemoryUsage: number;
    peakMemoryUsage: number;
    averageCpuTime: number;
    peakCpuTime: number;
    duration: number;
};
/**
 * Check if resource usage exceeds thresholds
 */
export declare function checkResourceThresholds(memoryUsageBytes: number, cpuTimeSeconds: number, thresholds: {
    maxMemoryBytes: number;
    maxCpuSeconds: number;
}): {
    memoryExceeded: boolean;
    cpuExceeded: boolean;
    warnings: string[];
};
/**
 * Format resource usage for logging
 */
export declare function formatResourceUsage(memoryUsageBytes: number, cpuTimeSeconds: number, durationMs: number): {
    memoryFormatted: string;
    cpuFormatted: string;
    durationFormatted: string;
};
/**
 * Format bytes in human-readable format
 */
export declare function formatBytes(bytes: number): string;