import type { ChildProcess } from 'node:child_process';
import type { Worker } from '@dazl/isomorphic-worker/worker';
export type PerformanceMetrics = {
    marks: PerformanceEntry[];
    measures: PerformanceEntry[];
};
export declare function bindMetricsListener(customFetcher?: () => Promise<PerformanceMetrics> | PerformanceMetrics): () => void;
export declare function localPerformanceFetcher(): {
    marks: any[];
    measures: any[];
};
export declare function getMetricsFromProcess(managerProcess: ChildProcess, timeout?: number): Promise<PerformanceMetrics>;
export declare function getMetricsFromWorker(worker: Worker): Promise<PerformanceMetrics>;
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