export interface PerformanceMetrics {
    memoryUsedMB: number;
    memoryDeltaMB?: number;
    cpuUserMs: number;
    cpuSystemMs: number;
    cpuDeltaUserMs?: number;
    cpuDeltaSystemMs?: number;
    durationMs: number;
}
export interface PerformanceSnapshot {
    memory: NodeJS.MemoryUsage;
    cpu: NodeJS.CpuUsage;
    timestamp: number;
}
export declare class PerformanceTracker {
    private startSnapshot?;
    static snapshot(): PerformanceSnapshot;
    start(): void;
    end(): PerformanceMetrics;
    static formatMetrics(metrics: PerformanceMetrics): string;
    private bytesToMB;
    private microToMilli;
}
export declare function trackPerformance<T>(operation: () => Promise<T>, onComplete?: (metrics: PerformanceMetrics) => void): Promise<T>;
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