export declare function getMicrosecondsTime(): number;
export declare function getNanosecondsTime(): number;
export declare function getDurationInMicroSeconds(before: number): number;
export declare class ProcessCpuProfiler {
    private cumulatedUsage;
    private startedAt;
    private samples;
    constructor(samplingPeriod?: number);
    private get lastSampleAt();
    private get samplesDistance();
    cpuUsageOverLastMilliseconds(elapsedMilliseconds: number): number;
    private cpuUsageOverLastX;
    private getSamplesResult;
}