/** 等待并获取用户输入内容 */
export declare function readSyncByRl(tips?: string): Promise<string>;
/** 计算指定函数的执行耗时。返回值单位为 ns */
export declare function calcTimeCost(fn: () => unknown, label?: string): Promise<number>;
export declare function getFormatedTimeCost(startTime: number, withTip?: boolean): string;
/**
 * 打印时间消耗
 * @param {number} startTime 开始时间戳
 */
export declare function logTimeCost(startTime: number, prefix?: string): void;