export default class Timer {
    private readonly now;
    private start;
    private markers;
    constructor(now?: () => Date);
    reset(): void;
    humanReadableElapsed(): string;
    elapsedSeconds(): number;
    elapsedMs(sinceMarker?: string): number;
    mark(name: string): void;
    private static humanReadableElapsedSeconds;
    private static humanReadableElapsedMinutes;
}
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