import { Logger } from 'loglevel';
export declare class TimeMeasurer {
    private initialTime;
    private now;
    private getTime;
    elapsedTime(): number;
}
export declare class EventProfiler {
    private logger;
    private label;
    private samples;
    private elapsedTime;
    private timeMeasurer;
    constructor(logger: Logger, label?: string);
    start(): void;
    stop(): void;
    private restart;
    private notify;
}
export declare class DummyProfiler {
    start(): void;
    stop(): void;
}