/**
 * Stopwatch class, uses native node to replicate/extend performance-now dependency.
 */
declare class Stopwatch {
    #private;
    /**
     * The number of digits to appear after the decimal point when returning the friendly duration.
     */
    digits: number;
    /**
     * Starts a new stopwatch
     */
    constructor(digits?: number);
    /**
     * The duration of this stopwatch since start or start to end if this stopwatch has stopped.
     */
    get duration(): number;
    /**
     * If the stopwatch is running or not.
     */
    get running(): boolean;
    /**
     * Restarts the stopwatch (Returns a running state)
     */
    restart(): this;
    /**
     * Resets the Stopwatch to 0 duration (Returns a stopped state)
     */
    reset(): this;
    /**
     * Starts the Stopwatch
     */
    start(): this;
    /**
     * Stops the Stopwatch, freezing the duration
     */
    stop(): this;
    /**
     * Defines toString behavior
     */
    toString(): string;
}

export { Stopwatch };